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Fortunately the number of staff from DCHFT who were involved in this data security breach was small , with fewer than 55 current or former employees affected .
 data breach: data security 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 security breach