363
In January , the hacker collected an unspecified Bitcoin reward for reporting a bug to the AlphaBay staff that would have allowed an attacker access to over 218,000 private messages .
 hacker: discoverer; a bug: vulnerability; AlphaBay staff: vulnerable system owner; allowed an attacker access: capabilities; January: time
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:
 hacker: discoverer; a bug: vulnerability; AlphaBay staff: vulnerable system owner; allowed an attacker access: capabilities; January: time