1894
On March 25 , security researcher Kevin Beaumont discovered something very unfortunate on Docs.com , Microsoft 's free document - sharing site tied to the company 's Office 365 service : its homepage had a search bar .
 ( discover vulnerability: discovered,  Docs.com: vulnerable system, security researcher Kevin Beaumont: discoverer, March 25: time) 
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: discovered,  Docs.com: vulnerable system, security researcher Kevin Beaumont: discoverer, March 25: time) 