2084
They were discovered by researcher Jason Doyle last fall , and their existence responsibly disclosed to Google , but have still not been patched .
 ( discover vulnerability: were discovered,  researcher Jason Doyle: discoverer, last fall: time, They: vulnerability) 
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: were discovered,  researcher Jason Doyle: discoverer, last fall: time, They: vulnerability) 