2557
The findings identified more than 493,000 smart devices in Barcelona and 5.3 million in Spain overall – including smart kettles , coffee machines , garage doors , fridges , thermostats and other IP - connected devices – that are connected to the internet and vulnerable to attacks .
 ( discover vulnerability: The findings identified,  smart devices: vulnerable system) 
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: The findings identified,  smart devices: vulnerable system) 