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And , while this example represents only one healthcare organization that was targeted , the researcher noted that it could signify the beginning of a trend with smaller ransomware operators , using RaaS platforms , aiming for the healthcare sector , “ ultimately leading to even bigger and diversified ransomware attacks ” against the sector , he wrote .
 ( ransom: ransomware attacks,  healthcare sector: attacker, using RaaS platforms: attack pattern, ransomware operators: 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:
 ( ransom: ransomware attacks,  healthcare sector: attacker, using RaaS platforms: attack pattern, ransomware operators: attacker) 