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The 21.5 million current and former federal employees impacted by the massive data breach in 2015 may never know if they will be targeted based on the information stolen from the Office of Personnel Management .
 data breach: data breach
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: data breach