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Within days of contacting Logitech , Ormandy says he had a meeting to discuss the vulnerability with its engineers on 18 September , who assured him they understood the problem .
 the vulnerability: vulnerability; its engineers: vulnerable system owner; Ormandy: discoverer; Logitech: vulnerable system owner; 18 September: 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:
 the vulnerability: vulnerability; its engineers: vulnerable system owner; Ormandy: discoverer; Logitech: vulnerable system owner; 18 September: time