2440
A security researcher from Google ’s Project Zero threat hunting team alerted Cloudfare to the bug last month .
 ( discover vulnerability: alerted,  A security researcher: discoverer, Cloudfare: vulnerable system owner, the bug: vulnerability, last month: time, Project Zero threat hunting team: discoverer, Google ’s: 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: alerted,  A security researcher: discoverer, Cloudfare: vulnerable system owner, the bug: vulnerability, last month: time, Project Zero threat hunting team: discoverer, Google ’s: discoverer) 