2703
For example , the 2016 Valentine ’s Day DDoS attacks used Shellshock , a critical vulnerability that ’s present in Linux , UNIX and Mac OS X that had been discovered more than a year earlier .
 discover vulnerability: present in
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: present in