1632
WASHINGTON — The Internal Revenue Service said on Thursday that the personal data of as many as 100,000 taxpayers could have been compromised through a scheme in which hackers posed as students using an online tool to apply for financial aid .
 ( phishing: posed as,  using an online tool to apply for financial aid: attack pattern, students: trusted entity, hackers: 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:
 ( phishing: posed as,  using an online tool to apply for financial aid: attack pattern, students: trusted entity, hackers: attacker) 