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In February , Zimperium launched an N - day acquisition program which is only interested in known security problems , rather than unknown and unpatched zero - days .
 February: time; Zimperium: discoverer; an N - day acquisition program: vulnerability; known security problems: vulnerability
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:
 February: time; Zimperium: discoverer; an N - day acquisition program: vulnerability; known security problems: vulnerability