3294
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,  obtaining the cell number: capabilities, De Ceukelaire: discoverer) 
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:
 ( discover vulnerability: proved his claim,  obtaining the cell number: capabilities, De Ceukelaire: discoverer) 