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As it is , the incident cost them $ 2.5 million to wipe the infected computers and beef up their security controls , much of which was covered by insurance .
 ( ransom: the incident,  them: victim, the infected computers: victim, $ 2.5 million: 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: the incident,  them: victim, the infected computers: victim, $ 2.5 million: price) 