ETH Price: $3,804.30 (+5.27%)

Transaction Details

Transaction Hash:
0xd520d8da306b1d1fee1742406fb46c71cba94e21ed462465d04f57064cd7d1ae
Status:
Success
Block:
1053647210846798 Block Confirmations
Timestamp:
1599 days ago (Jul-26-2020 05:38:42 PM UTC)

Transaction Action:
Call 0xf8b40e3a Method by 0x3f752758...f2EB374b2 on 0x00000000...e5226E58a

Sponsored:

To:
Transfer0.090650540112411912 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca09...EE6aFdbAE
Transfer0.094308978728310779 ETHFrom
0x00000000...e5226E58a
To
0xB001cA03...802eCEC44
Transfer0.084680059062947915 ETHFrom
0x00000000...e5226E58a
To
0xb001CA07...b108DA397
Transfer0.076175641029597795 ETHFrom
0x00000000...e5226E58a
To
0xB001CA03...7750fBbd2
Transfer0.143127014114584085 ETHFrom
0x00000000...e5226E58a
To
0xB001ca0A...54DD7C7F3
Transfer0.087188844185476232 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca08...30d9fD46e
Transfer0.087225800419473224 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca00...940f5aa15
Transfer0.060275609265833 ETHFrom
0x00000000...e5226E58a
To
0xB001cA08...1c2eCf589
Transfer0.109765165129266108 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0E...aB2d95382
Transfer0.164311704355167871 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca06...1dA6B807e
Transfer0.065142654311653896 ETHFrom
0x00000000...e5226E58a
To
0xb001cA0C...4A04CaEC4
Transfer0.056880202065048577 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0d...0E188a424
Transfer0.064682657283536876 ETHFrom
0x00000000...e5226E58a
To
0xB001cA00...86F33e71E
Transfer0.057891491559812302 ETHFrom
0x00000000...e5226E58a
To
0xb001cA08...C3F110254
Transfer0.140708780495240313 ETHFrom
0x00000000...e5226E58a
To
0xb001CA07...116319Fa6
Transfer0.140306931231114896 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0d...c924C743D
Transfer0.104868991558677291 ETHFrom
0x00000000...e5226E58a
To
0xb001cA05...55F8066eE
Transfer0.083322893178701519 ETHFrom
0x00000000...e5226E58a
To
0xB001CA06...718f7e5A2
Transfer0.087853212318181288 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca0E...3deb6D37a
Transfer0.14770695607872506 ETHFrom
0x00000000...e5226E58a
To
0xb001cA0f...BeCF7D03B
Transfer0.087224623081812911 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca01...D64D8752E
Transfer0.085086372878683642 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca0E...Ff24B3432
Transfer0.0939372017306465 ETHFrom
0x00000000...e5226E58a
To
0xb001cA02...79370492C
Transfer0.076321013638852762 ETHFrom
0x00000000...e5226E58a
To
0xB001CA02...4846c3C09
Transfer0.086625314122970274 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca02...fd66c769F
Transfer0.09045462988209628 ETHFrom
0x00000000...e5226E58a
To
0xb001cA0B...95738f271
Transfer0.04187458587770732 ETHFrom
0x00000000...e5226E58a
To
0xb001CA09...C9ff55783
Transfer0.093072129935690445 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0f...B1400B64e
Transfer0.093666869158622953 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca05...356180884
Transfer0.1117680919760037 ETHFrom
0x00000000...e5226E58a
To
0xB001cA02...e2906eCF7
Transfer0.08889824088084137 ETHFrom
0x00000000...e5226E58a
To
0xb001cA05...D58E69e9D
Transfer0.07361098947001901 ETHFrom
0x00000000...e5226E58a
To
0xB001cA0f...8b0Bc6CD9
Transfer0.08429889604687647 ETHFrom
0x00000000...e5226E58a
To
0xb001CA04...B3fDC4692
Transfer0.125331184094331722 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0B...1377490ED
Transfer0.074122871302439561 ETHFrom
0x00000000...e5226E58a
To
0xb001ca0a...BaF22B1E2
Transfer0.131682153068469807 ETHFrom
0x00000000...e5226E58a
To
0xb001CA09...4D6863140
Transfer0.136565807450456788 ETHFrom
0x00000000...e5226E58a
To
0xB001CA07...2f6787152
Transfer0.066532440877723484 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0B...8332Ff866
Transfer0.111254563653918689 ETHFrom
0x00000000...e5226E58a
To
0xB001cA06...37C4acd22
Transfer0.10169509191345259 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca0B...69eF0f750
Transfer0.195576614667597794 ETHFrom
0x00000000...e5226E58a
To
0xB001CA08...cc46D1307
Transfer0.110964630537258432 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0b...2D025c609
Transfer0.123445016807464167 ETHFrom
0x00000000...e5226E58a
To
0xb001ca09...d1A397a16
Transfer0.106221981951409674 ETHFrom
0x00000000...e5226E58a
To
0xb001CA08...1442ce6Db
Transfer0.072481536374331189 ETHFrom
0x00000000...e5226E58a
To
0xB001ca04...d2Ff5cfAc
Transfer0.211567865029924737 ETHFrom
0x00000000...e5226E58a
To
0xb001cA06...CFa0eC33A
Transfer0.076557803981596711 ETHFrom
0x00000000...e5226E58a
To
0xB001ca00...599499144
Transfer0.058989464250585669 ETHFrom
0x00000000...e5226E58a
To
0xB001cA0E...b9254EC4F
Transfer0.053564855434333522 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca08...30d438EFe
Transfer0.108037662341721273 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0c...5ba1fd947
Transfer0.096581567501985208 ETHFrom
0x00000000...e5226E58a
To
0xb001cA05...d54bB2061
Transfer0.074850327470020874 ETHFrom
0x00000000...e5226E58a
To
0xB001ca0b...B3869f41d
Transfer0.056983325466651158 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0B...2e20abf4F
Transfer0.111736176545782508 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca04...747DB7Fd4
Transfer0.083076867465274019 ETHFrom
0x00000000...e5226E58a
To
0xb001ca05...DE9598774
Transfer0.071888348881602691 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca03...A0D146aee
Transfer0.095478970121767655 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca0C...d11A89ADD
Transfer0.173858342491731858 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca0A...5F0bE7c29
Transfer0.13591450070495723 ETHFrom
0x00000000...e5226E58a
To
0xB001cA0c...5Ee392d02
Transfer0.09131376463786183 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca0D...0FFdFa8D2
Transfer0.043818850604072258 ETHFrom
0x00000000...e5226E58a
To
0xb001ca06...19a1c0a3f
Transfer0.091154341151803096 ETHFrom
0x00000000...e5226E58a
To
0xB001ca07...b86573023
Transfer0.06808091558256381 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca01...d92946AF3
Transfer0.043514584651915078 ETHFrom
0x00000000...e5226E58a
To
0xB001ca0E...30FD92d16
Transfer0.124625230146763857 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca0E...2Fbf60c82
Transfer0.102301489746273613 ETHFrom
0x00000000...e5226E58a
To
0xb001CA02...4388F8b00
Transfer0.101226838401155011 ETHFrom
0x00000000...e5226E58a
To
0xb001CA08...51D2c5aa2
Transfer0.131454499500563497 ETHFrom
0x00000000...e5226E58a
To
0xb001cA04...BA4aC27AD
Transfer0.087987684832965251 ETHFrom
0x00000000...e5226E58a
To
0xb001CA07...75bC2Bb8C
Transfer0.066636360266866302 ETHFrom
0x00000000...e5226E58a
To
0xB001CA0B...Dd3704e37
Transfer0.099574752314385591 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca0c...3f19Fc706
Transfer0.077244605099448507 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca08...294dcFE03
Transfer0.091696671208868899 ETHFrom
0x00000000...e5226E58a
To
0xB001ca09...f6140f9e2
Transfer0.067150524317472549 ETHFrom
0x00000000...e5226E58a
To
0xB001ca0D...B4D5dd248
Transfer0.074029944317223035 ETHFrom
0x00000000...e5226E58a
To
0xb001cA0C...6c28EEf34
Transfer0.090026890314395296 ETHFrom
0x00000000...e5226E58a
To
0xB001cA03...69D7F475E
Transfer0.166296902795192678 ETHFrom
0x00000000...e5226E58a
To
0xB001cA00...28D54e1Fa
Transfer0.08889324167712792 ETHFrom
0x00000000...e5226E58a
To
0xb001ca03...a8F93Ba81
Transfer0.090334260848619715 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca03...Bfec00B5F
Transfer0.187875807062065606 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca0A...f0136ccED
Transfer0.061568559016890313 ETHFrom
0x00000000...e5226E58a
To
0xb001ca02...4897ea842
Transfer0.076519273991270594 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca05...a36a91fca
Transfer0.04660121174778091 ETHFrom
0x00000000...e5226E58a
To
0xb001cA08...6519aFbaE
Transfer0.082634246244004783 ETHFrom
0x00000000...e5226E58a
To
0xB001cA00...53506CC03
Transfer0.039174266066630133 ETHFrom
0x00000000...e5226E58a
To
0xb001Ca0D...69cef81Cf
Transfer0.08911953285362787 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0f...F1D96E46D
Transfer0.08902379223912365 ETHFrom
0x00000000...e5226E58a
To
0xb001CA08...E0E3030e7
Transfer0.107583598756928114 ETHFrom
0x00000000...e5226E58a
To
0xb001CA0b...0Cbb5B857
Transfer0.052368171082623913 ETHFrom
0x00000000...e5226E58a
To
0xb001cA03...DefB8412F
Transfer0.072766031788154997 ETHFrom
0x00000000...e5226E58a
To
0xb001cA07...b4Ee6621C
Transfer0.085690551810146937 ETHFrom
0x00000000...e5226E58a
To
0xB001Ca00...248207317
Transfer0.053719789266972748 ETHFrom
0x00000000...e5226E58a
To
0xB001ca0b...C684dcAC4
Transfer0.058313833372168296 ETHFrom
0x00000000...e5226E58a
To
0xb001ca03...41534CBa1
Transfer0.127955549785888543 ETHFrom
0x00000000...e5226E58a
To
0xb001ca07...983074588
Transfer0.095150428410701815 ETHFrom
0x00000000...e5226E58a
To
0xB001ca05...3C34B18b0
Transfer0.135466408962351733 ETHFrom
0x00000000...e5226E58a
To
0xb001ca06...C34588de6
Transfer0.133921710097003999 ETHFrom
0x00000000...e5226E58a
To
0xB001ca01...7d6F470A3
Transfer0.229308995024273228 ETHFrom
0x00000000...e5226E58a
To
0xb001ca02...C13635dDE
Transfer0.075086561087392215 ETHFrom
0x00000000...e5226E58a
To
0xb001ca0a...38E41cF2F
Transfer0.101925228396718363 ETHFrom
0x00000000...e5226E58a
To
0xb001cA0e...391Bae8D8

Value:
0 ETH ($0.00)
Transaction Fee:
0.0684074077158225 ETH $260.24
Gas Price:
62.03909465 Gwei (0.00000006203909465 ETH)
Ether Price:
$311.47 / ETH
Gas Limit & Usage by Txn:
1,104,062 | 1,102,650 (99.87%)

Other Attributes:
Nonce: 241 Position In Block: 108
Input Data:

Private Note:
To access the Private Note feature, you must be Logged In

The contract call From 0x3f752758...f2EB374b2 To 0x00000000...e5226E58a produced 100 Internal Transactions

ADVANCED MODE:
Type Trace Address From   To Value Gas Limit
call_00x00000000...e5226E58a 0xb001Ca09...EE6aFdbAE0.090650540112411912 ETH2,300
call_10x00000000...e5226E58a 0xB001cA03...802eCEC440.094308978728310779 ETH2,300
call_20x00000000...e5226E58a 0xb001CA07...b108DA3970.084680059062947915 ETH2,300
call_30x00000000...e5226E58a 0xB001CA03...7750fBbd20.076175641029597795 ETH2,300
call_40x00000000...e5226E58a 0xB001ca0A...54DD7C7F30.143127014114584085 ETH2,300
call_50x00000000...e5226E58a 0xb001Ca08...30d9fD46e0.087188844185476232 ETH2,300
call_60x00000000...e5226E58a 0xB001Ca00...940f5aa150.087225800419473224 ETH2,300
call_70x00000000...e5226E58a 0xB001cA08...1c2eCf5890.060275609265833 ETH2,300
call_80x00000000...e5226E58a 0xB001CA0E...aB2d953820.109765165129266108 ETH2,300
call_90x00000000...e5226E58a 0xB001Ca06...1dA6B807e0.164311704355167871 ETH2,300
call_100x00000000...e5226E58a 0xb001cA0C...4A04CaEC40.065142654311653896 ETH2,300
call_110x00000000...e5226E58a 0xb001CA0d...0E188a4240.056880202065048577 ETH2,300
call_120x00000000...e5226E58a 0xB001cA00...86F33e71E0.064682657283536876 ETH2,300
call_130x00000000...e5226E58a 0xb001cA08...C3F1102540.057891491559812302 ETH2,300
call_140x00000000...e5226E58a 0xb001CA07...116319Fa60.140708780495240313 ETH2,300
call_150x00000000...e5226E58a 0xB001CA0d...c924C743D0.140306931231114896 ETH2,300
call_160x00000000...e5226E58a 0xb001cA05...55F8066eE0.104868991558677291 ETH2,300
call_170x00000000...e5226E58a 0xB001CA06...718f7e5A20.083322893178701519 ETH2,300
call_180x00000000...e5226E58a 0xB001Ca0E...3deb6D37a0.087853212318181288 ETH2,300
call_190x00000000...e5226E58a 0xb001cA0f...BeCF7D03B0.14770695607872506 ETH2,300
call_200x00000000...e5226E58a 0xB001Ca01...D64D8752E0.087224623081812911 ETH2,300
call_210x00000000...e5226E58a 0xb001Ca0E...Ff24B34320.085086372878683642 ETH2,300
call_220x00000000...e5226E58a 0xb001cA02...79370492C0.0939372017306465 ETH2,300
call_230x00000000...e5226E58a 0xB001CA02...4846c3C090.076321013638852762 ETH2,300
call_240x00000000...e5226E58a 0xb001Ca02...fd66c769F0.086625314122970274 ETH2,300
call_250x00000000...e5226E58a 0xb001cA0B...95738f2710.09045462988209628 ETH2,300
call_260x00000000...e5226E58a 0xb001CA09...C9ff557830.04187458587770732 ETH2,300
call_270x00000000...e5226E58a 0xb001CA0f...B1400B64e0.093072129935690445 ETH2,300
call_280x00000000...e5226E58a 0xB001Ca05...3561808840.093666869158622953 ETH2,300
call_290x00000000...e5226E58a 0xB001cA02...e2906eCF70.1117680919760037 ETH2,300
call_300x00000000...e5226E58a 0xb001cA05...D58E69e9D0.08889824088084137 ETH2,300
call_310x00000000...e5226E58a 0xB001cA0f...8b0Bc6CD90.07361098947001901 ETH2,300
call_320x00000000...e5226E58a 0xb001CA04...B3fDC46920.08429889604687647 ETH2,300
call_330x00000000...e5226E58a 0xB001CA0B...1377490ED0.125331184094331722 ETH2,300
call_340x00000000...e5226E58a 0xb001ca0a...BaF22B1E20.074122871302439561 ETH2,300
call_350x00000000...e5226E58a 0xb001CA09...4D68631400.131682153068469807 ETH2,300
call_360x00000000...e5226E58a 0xB001CA07...2f67871520.136565807450456788 ETH2,300
call_370x00000000...e5226E58a 0xb001CA0B...8332Ff8660.066532440877723484 ETH2,300
call_380x00000000...e5226E58a 0xB001cA06...37C4acd220.111254563653918689 ETH2,300
call_390x00000000...e5226E58a 0xB001Ca0B...69eF0f7500.10169509191345259 ETH2,300
call_400x00000000...e5226E58a 0xB001CA08...cc46D13070.195576614667597794 ETH2,300
call_410x00000000...e5226E58a 0xB001CA0b...2D025c6090.110964630537258432 ETH2,300
call_420x00000000...e5226E58a 0xb001ca09...d1A397a160.123445016807464167 ETH2,300
call_430x00000000...e5226E58a 0xb001CA08...1442ce6Db0.106221981951409674 ETH2,300
call_440x00000000...e5226E58a 0xB001ca04...d2Ff5cfAc0.072481536374331189 ETH2,300
call_450x00000000...e5226E58a 0xb001cA06...CFa0eC33A0.211567865029924737 ETH2,300
call_460x00000000...e5226E58a 0xB001ca00...5994991440.076557803981596711 ETH2,300
call_470x00000000...e5226E58a 0xB001cA0E...b9254EC4F0.058989464250585669 ETH2,300
call_480x00000000...e5226E58a 0xb001Ca08...30d438EFe0.053564855434333522 ETH2,300
call_490x00000000...e5226E58a 0xb001CA0c...5ba1fd9470.108037662341721273 ETH2,300
call_500x00000000...e5226E58a 0xb001cA05...d54bB20610.096581567501985208 ETH2,300
call_510x00000000...e5226E58a 0xB001ca0b...B3869f41d0.074850327470020874 ETH2,300
call_520x00000000...e5226E58a 0xB001CA0B...2e20abf4F0.056983325466651158 ETH2,300
call_530x00000000...e5226E58a 0xB001Ca04...747DB7Fd40.111736176545782508 ETH2,300
call_540x00000000...e5226E58a 0xb001ca05...DE95987740.083076867465274019 ETH2,300
call_550x00000000...e5226E58a 0xB001Ca03...A0D146aee0.071888348881602691 ETH2,300
call_560x00000000...e5226E58a 0xB001Ca0C...d11A89ADD0.095478970121767655 ETH2,300
call_570x00000000...e5226E58a 0xB001Ca0A...5F0bE7c290.173858342491731858 ETH2,300
call_580x00000000...e5226E58a 0xB001cA0c...5Ee392d020.13591450070495723 ETH2,300
call_590x00000000...e5226E58a 0xb001Ca0D...0FFdFa8D20.09131376463786183 ETH2,300
call_600x00000000...e5226E58a 0xb001ca06...19a1c0a3f0.043818850604072258 ETH2,300
call_610x00000000...e5226E58a 0xB001ca07...b865730230.091154341151803096 ETH2,300
call_620x00000000...e5226E58a 0xB001Ca01...d92946AF30.06808091558256381 ETH2,300
call_630x00000000...e5226E58a 0xB001ca0E...30FD92d160.043514584651915078 ETH2,300
call_640x00000000...e5226E58a 0xb001Ca0E...2Fbf60c820.124625230146763857 ETH2,300
call_650x00000000...e5226E58a 0xb001CA02...4388F8b000.102301489746273613 ETH2,300
call_660x00000000...e5226E58a 0xb001CA08...51D2c5aa20.101226838401155011 ETH2,300
call_670x00000000...e5226E58a 0xb001cA04...BA4aC27AD0.131454499500563497 ETH2,300
call_680x00000000...e5226E58a 0xb001CA07...75bC2Bb8C0.087987684832965251 ETH2,300
call_690x00000000...e5226E58a 0xB001CA0B...Dd3704e370.066636360266866302 ETH2,300
call_700x00000000...e5226E58a 0xb001Ca0c...3f19Fc7060.099574752314385591 ETH2,300
call_710x00000000...e5226E58a 0xB001Ca08...294dcFE030.077244605099448507 ETH2,300
call_720x00000000...e5226E58a 0xB001ca09...f6140f9e20.091696671208868899 ETH2,300
call_730x00000000...e5226E58a 0xB001ca0D...B4D5dd2480.067150524317472549 ETH2,300
call_740x00000000...e5226E58a 0xb001cA0C...6c28EEf340.074029944317223035 ETH2,300
call_750x00000000...e5226E58a 0xB001cA03...69D7F475E0.090026890314395296 ETH2,300
call_760x00000000...e5226E58a 0xB001cA00...28D54e1Fa0.166296902795192678 ETH2,300
call_770x00000000...e5226E58a 0xb001ca03...a8F93Ba810.08889324167712792 ETH2,300
call_780x00000000...e5226E58a 0xB001Ca03...Bfec00B5F0.090334260848619715 ETH2,300
call_790x00000000...e5226E58a 0xB001Ca0A...f0136ccED0.187875807062065606 ETH2,300
call_800x00000000...e5226E58a 0xb001ca02...4897ea8420.061568559016890313 ETH2,300
call_810x00000000...e5226E58a 0xB001Ca05...a36a91fca0.076519273991270594 ETH2,300
call_820x00000000...e5226E58a 0xb001cA08...6519aFbaE0.04660121174778091 ETH2,300
call_830x00000000...e5226E58a 0xB001cA00...53506CC030.082634246244004783 ETH2,300
call_840x00000000...e5226E58a 0xb001Ca0D...69cef81Cf0.039174266066630133 ETH2,300
call_850x00000000...e5226E58a 0xb001CA0f...F1D96E46D0.08911953285362787 ETH2,300
call_860x00000000...e5226E58a 0xb001CA08...E0E3030e70.08902379223912365 ETH2,300
call_870x00000000...e5226E58a 0xb001CA0b...0Cbb5B8570.107583598756928114 ETH2,300
call_880x00000000...e5226E58a 0xb001cA03...DefB8412F0.052368171082623913 ETH2,300
call_890x00000000...e5226E58a 0xb001cA07...b4Ee6621C0.072766031788154997 ETH2,300
call_900x00000000...e5226E58a 0xB001Ca00...2482073170.085690551810146937 ETH2,300
call_910x00000000...e5226E58a 0xB001ca0b...C684dcAC40.053719789266972748 ETH2,300
call_920x00000000...e5226E58a 0xb001ca03...41534CBa10.058313833372168296 ETH2,300
call_930x00000000...e5226E58a 0xb001ca07...9830745880.127955549785888543 ETH2,300
call_940x00000000...e5226E58a 0xB001ca05...3C34B18b00.095150428410701815 ETH2,300
call_950x00000000...e5226E58a 0xb001ca06...C34588de60.135466408962351733 ETH2,300
call_960x00000000...e5226E58a 0xB001ca01...7d6F470A30.133921710097003999 ETH2,300
call_970x00000000...e5226E58a 0xb001ca02...C13635dDE0.229308995024273228 ETH2,300
call_980x00000000...e5226E58a 0xb001ca0a...38E41cF2F0.075086561087392215 ETH2,300
call_990x00000000...e5226E58a 0xb001cA0e...391Bae8D80.101925228396718363 ETH2,300
Transaction Receipt Event Logs

                
Loading...
Loading
Loading...
Loading
Loading...
Loading

A transaction is a cryptographically signed instruction that changes the blockchain state. Block explorers track the details of all transactions in the network. Learn more about transactions in our Knowledge Base.