3110
According to Tavis Ormandy at Google ’s Project Zero , who discovered and documented the bug , there are more than 20 million WebEx users worldwide .
 Tavis Ormandy: discoverer; the bug: vulnerability; Project Zero: discoverer; Google: 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:
 Tavis Ormandy: discoverer; the bug: vulnerability; Project Zero: discoverer; Google: discoverer