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The New Jersey Spine Center and Marin Healthcare District were attacked by Cryptowall , which encrypted electronic health records , backup files and the phone system .
 ( ransom: were attacked,  The New Jersey Spine Center: victim, Marin Healthcare District: victim, Cryptowall: tool, encrypted electronic health records: attack pattern) 
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: were attacked,  The New Jersey Spine Center: victim, Marin Healthcare District: victim, Cryptowall: tool, encrypted electronic health records: attack pattern) 