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Originally , it was believed that the breach involved GameStop retail stores and that the company ’s point - of - sale system may have been infected with malware .
 ( data breach: breach,  GameStop retail stores: victim, company: victim, point - of - sale system: victim, have been infected: attack pattern, malware: tool) 
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:
 ( data breach: breach,  GameStop retail stores: victim, company: victim, point - of - sale system: victim, have been infected: attack pattern, malware: tool) 