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In January and February , Redmond emitted fixes for Windows 7 and Server 2008 R2 machines to counter the Meltdown chip - level vulnerability in modern Intel x64 processors .
 patch vulnerability: emitted
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 patch vulnerability: emitted