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Hackers that tried to extort money from Disney by threatening to make public an upcoming movie ahead of its release date appear to have been bluffing , the firm ’s boss has revealed .
 ( ransom: extort money,  threatening to make public: attack pattern, Disney: victim, Hackers: attacker, have been bluffing: attack pattern) 
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: extort money,  threatening to make public: attack pattern, Disney: victim, Hackers: attacker, have been bluffing: attack pattern) 