2076
The databases were stolen between 2011 to 2017 from widely visited forums providing information about Bitcoin mining and trading .
 ( data breach: were stolen,  between 2011 to 2017: time, widely visited forums: victim, The databases: compromised data, information: 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: were stolen,  between 2011 to 2017: time, widely visited forums: victim, The databases: compromised data, information: compromised data) 