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Swedish researcher Ulf Frisk discovered the January and February Meltdown mitigations for Win7 and Server 2008 R2 were broken , and went public with his findings once the March Patch Tuesday had kicked off .
 discover vulnerability: discovered
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:
 discover vulnerability: discovered