663
Google Project Zero 's security researchers have discovered another critical remote code execution ( RCE ) vulnerability in Microsoft ’s Windows operating system , claiming that it is something truly bad .
 Windows operating system: vulnerable system; remote code execution ( RCE ) vulnerability: vulnerability; security researchers: discoverer; Microsoft: vulnerable system owner; Google Project Zero: 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:
 Windows operating system: vulnerable system; remote code execution ( RCE ) vulnerability: vulnerability; security researchers: discoverer; Microsoft: vulnerable system owner; Google Project Zero: discoverer