3301
Billions of online credentials freshly stolen in 2016 are fueling a practice of automated login hacks that are overwhelming legitimate human - login traffic on enterprise Web properties .
 ( data breach: stolen,  2016: time, online credentials: compromised data, Billions: number of 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: stolen,  2016: time, online credentials: compromised data, Billions: number of victim) 