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The attack appears to have struck Northern Ireland ’s Ulster University on the same day a ransomware outage affected University College London ( UCL ) .
 ( ransom: The attack,  Northern Ireland ’s Ulster University: victim, same day: time) 
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:
 ( ransom: The attack,  Northern Ireland ’s Ulster University: victim, same day: time) 