2468
However , John Bambenek , threat systems manager , Fidelis Cybersecurity , revealed that the combination of these features has allowed the firm to uncover a big privacy problem .
 Fidelis Cybersecurity: discoverer; threat systems manager: discoverer; John Bambenek: discoverer
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 Fidelis Cybersecurity: discoverer; threat systems manager: discoverer; John Bambenek: discoverer