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A hacker posing as Superintendent Diana Greene sent an email to one of the employees , requesting all W - 2 forms for district employees .
 ( phishing: posing as,  A hacker: attacker, Superintendent Diana Greene: trusted entity) 
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:
 ( phishing: posing as,  A hacker: attacker, Superintendent Diana Greene: trusted entity) 