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Last week , Intel revealed that a serious security flaw in some of its chips left potentially thousands of devices vulnerable to attackers .
 ( discover vulnerability: revealed,  Last week: time, Intel: vulnerable system owner, a serious security flaw: vulnerability, chips: vulnerable system, 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: revealed,  Last week: time, Intel: vulnerable system owner, a serious security flaw: vulnerability, chips: vulnerable system, devices: vulnerable system) 