1381
After finishing his research , Hanson submitted a write - up on the three bugs he found to Microsoft in October 2016 , via the company 's bug bounty program .
 ( discover vulnerability: submitted a write - up,  Hanson: discoverer, the three bugs: 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: submitted a write - up,  Hanson: discoverer, the three bugs: vulnerability) 