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" There is this stream of liability that flows from the ransomware attack , " he said " That 's liability to individuals , consumers and patients , " WannaCry exploits a vulnerability in older versions of Windows , including Windows 7 and Windows XP .
 a vulnerability: vulnerability; older versions: vulnerable system version; Windows: vulnerable system; Windows 7: vulnerable system; Windows XP: vulnerable system
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 vulnerability: vulnerability; older versions: vulnerable system version; Windows: vulnerable system; Windows 7: vulnerable system; Windows XP: vulnerable system