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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
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 data breach: unauthorized access