1508
The company acknowledged the investigation after being contacted by Brian Krebs , confirming that it received a “ notification from a third party ” saying that info from cards used at GameStop.com were being offered for sale on the Dark Web .
 ( data breach: were being offered for sale,  GameStop.com: victim, info from cards: compromised data) 
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: were being offered for sale,  GameStop.com: victim, info from cards: compromised data) 