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He also provided Facebook security team with an in - depth proof of concept ( PoC ) who patched the issue and awarded him a sum of $ 40,000 through the Bugcrowd payment system .
 ( discover vulnerability: provided,  Facebook security team: vulnerable system owner, He: discoverer) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: provided,  Facebook security team: vulnerable system owner, He: discoverer) 