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A security researcher from Google ’s Project Zero threat hunting team alerted Cloudfare to the bug last month .
 A security researcher: discoverer; Cloudfare: vulnerable system owner; the bug: vulnerability; last month: time; Project Zero threat hunting team: discoverer; Google ’s: 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:
 A security researcher: discoverer; Cloudfare: vulnerable system owner; the bug: vulnerability; last month: time; Project Zero threat hunting team: discoverer; Google ’s: discoverer