547
However , the authors of the " WannaCry " ransomware attack told their victims the amount they must pay will double if they do not comply within three days of the original infection , by Monday in most cases .
 ( ransom: the " WannaCry " ransomware attack,  the authors: attacker, victims: victim) 
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 " WannaCry " ransomware attack,  the authors: attacker, victims: victim) 