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" We are investigating alleged unauthorized access to our online portal where a person or persons using stolen credentials accessed W - 2 information of a limited number of individuals , " an Equifax spokesperson told El Reg on Monday .
 ( data breach: unauthorized access,  our online portal: victim) 
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: unauthorized access,  our online portal: victim) 