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Yet recent research co-authored by a Michigan State University business scholar found nearly 1,800 occurrences of large data breaches in patient information over a seven - year period .
 ( data breach: large data breaches,  patient information: compromised data, seven - year period: 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: large data breaches,  patient information: compromised data, seven - year period: time) 