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Only outdated versions of Flash Player , Silverlight , Internet Explorer and Microsoft Edge are the focus of the attack , Zaharia said .
 Zaharia: discoverer; Microsoft Edge: vulnerable system; Internet Explorer: vulnerable system; Silverlight: vulnerable system; Flash Player: vulnerable system; outdated versions: vulnerable system version
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:
 Zaharia: discoverer; Microsoft Edge: vulnerable system; Internet Explorer: vulnerable system; Silverlight: vulnerable system; Flash Player: vulnerable system; outdated versions: vulnerable system version