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However , from the viewpoint of a private citizen whose entire database has been held hostage by vicious hackers , not paying a ransom is hardly an option .
 ( ransom: paying a ransom,  vicious hackers: attacker, entire database has been held hostage: attack pattern, a private citizen: 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:
 ( ransom: paying a ransom,  vicious hackers: attacker, entire database has been held hostage: attack pattern, a private citizen: victim) 