2207
A Chrome browser update , which has been rolling out since February , now issues a warning when you 've landed on an page with the scam .
 ( patch vulnerability: has been rolling out,  A Chrome browser update: patch, February: time, now issues: 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:
 ( patch vulnerability: has been rolling out,  A Chrome browser update: patch, February: time, now issues: vulnerability) 