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Last spring , a Ponemon Institute survey found that 79 percent of healthcare organizations experienced two or more data breaches in the past two years , and 45 percent experienced five or more breaches .
 ( data breach: two or more data breaches,  79 percent of healthcare organizations: victim, the past two years: time) 
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:
 ( data breach: two or more data breaches,  79 percent of healthcare organizations: victim, the past two years: time) 