1831
A hacker allegedly used a vulnerability in MySQL to steal 6.5 million emails and poorly encrypted passwords from Dueling Network , a card game in the style of Yu - Gi - Oh , announced Motherboard .
 ( data breach: steal,  used a vulnerability in MySQL: attack pattern, A hacker: attacker, 6.5 million: number of data, emails: compromised data, passwords: compromised data, Dueling Network: victim) 
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: steal,  used a vulnerability in MySQL: attack pattern, A hacker: attacker, 6.5 million: number of data, emails: compromised data, passwords: compromised data, Dueling Network: victim) 