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Hacking groups such as DC Leaks , Fancy Bears and Guccifer 2.0 who were responsible for the leaking of damaging information about the Democrat party .
 ( data breach: the leaking,  Guccifer 2.0: attacker, Fancy Bears: attacker, DC Leaks: attacker, information: compromised data, the Democrat party: victim, Hacking groups: attacker) 
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: the leaking,  Guccifer 2.0: attacker, Fancy Bears: attacker, DC Leaks: attacker, information: compromised data, the Democrat party: victim, Hacking groups: attacker) 