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Library management refused to pay the $ 35,000 demanded as ransom , and IT staff wiped affected servers and restored them from available backups .
 ( ransom: refused to pay,  Library management: victim, $ 35,000: price) 
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: refused to pay,  Library management: victim, $ 35,000: price) 