2564
Avast identified more than 22,000 webcams and baby monitors in the city that are vulnerable to attack , which means that cybercriminals could livestream the videos directly to the Internet .
 ( discover vulnerability: identified,  webcams: vulnerable system, baby monitors: vulnerable system, Avast: 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: identified,  webcams: vulnerable system, baby monitors: vulnerable system, Avast: discoverer) 