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Microsoft issued a patch for its supported systems in March , weeks before Shadow Brokers released the exploit , but many computer systems around the world remained unpatched , leaving them vulnerable to the latest ransomware attack .
 a patch: patch; Microsoft: releaser; systems: vulnerable system; March: 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: patch vulnerability 
  Option: issues addressed, patch, vulnerability, time, vulnerable system version, releaser, patch number, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 a patch: patch; Microsoft: releaser; systems: vulnerable system; March: time