524
The company no longer provides regular software updates to Windows XP , a version first released in 2001 , unless customers pay for “ custom support , ” a practice some observers believe has put users at risk .
 ( patch vulnerability: provides,  company: releaser, software updates: patch, Windows XP: 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:
 ( patch vulnerability: provides,  company: releaser, software updates: patch, Windows XP: vulnerable system) 