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To understand why it is so difficult to defend computers from even moderately capable hackers , consider the case of the security flaw officially known as CVE -2017-0199 .
 discover vulnerability: officially known as
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: officially known as