1892
What they fail to realize is that all services have to face vulnerabilities from time to time , and all of them get patched up as soon as they are discovered .
 ( discover vulnerability: fail to realize,  they: vulnerable system owner, all services: vulnerable system, vulnerabilities: 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: fail to realize,  they: vulnerable system owner, all services: vulnerable system, vulnerabilities: vulnerability) 