1841
The hacker appears to have stolen at least 6.5 million accounts , although Black Luster Soldier cautioned that not all of those necessarily correspond to individual players .
 ( data breach: have stolen,  The hacker: attacker, 6.5 million: number of victim, accounts: compromised data) 
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:
 ( data breach: have stolen,  The hacker: attacker, 6.5 million: number of victim, accounts: compromised data) 