1192
Researchers from several German universities have checked the PHP codebases of over 64,000 projects on GitHub , and found 117 vulnerabilities that they believe have been introduced through the use of code from popular but insufficiently reviewed tutorials .
 ( discover vulnerability: found,  GitHub: vulnerable system, 117 vulnerabilities: vulnerability, the PHP codebases: vulnerability, Researchers: discoverer, German universities: discoverer) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: found,  GitHub: vulnerable system, 117 vulnerabilities: vulnerability, the PHP codebases: vulnerability, Researchers: discoverer, German universities: discoverer) 