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Must Read : Hacking Facebook Account by Knowing Account Phone Number Reportedly , De Ceukelaire proved his claim by obtaining the cell number of Jan Jambon , the Interior Minister for Belgium , through his Facebook profile .
 discover vulnerability: proved his claim
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:
 discover vulnerability: proved his claim