3127
Alternatively , these security flaws would be of interest to law enforcement agencies attempting to close down such operations -- and may have been known to them before the hacker discovered the bugs .
 ( discover vulnerability: may have been known,  these security flaws: vulnerability, law enforcement agencies: discoverer, them: vulnerability) 
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: may have been known,  these security flaws: vulnerability, law enforcement agencies: discoverer, them: vulnerability) 