445
" News of the extortion attempt first appeared in The Hollywood Reporter on 15 May when Bob Iger , CEO at Walt Disney , revealed the hackers had demanded that Disney pay a " huge sum " in Bitcoins to prevent them from leaking a then - undisclosed movie online .
 ( ransom: had demanded,  hackers: attacker) 
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: had demanded,  hackers: attacker) 