986
Vermeulen reported the bug over a year ago , in April 2017 , but said the company stopped responding .
 Vermeulen: discoverer; the bug: vulnerability; over a year ago: time; April 2017: 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:
 Vermeulen: discoverer; the bug: vulnerability; over a year ago: time; April 2017: time