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Maxim Rupp , an independent security researcher based in Germany , dug up the bugs and teased them on Twitter at the beginning of January .
 discover vulnerability: dug up
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: dug up