1790
Hackers are seeking a whole lot of money to return control of the network to its rightful owners .
 ( ransom: are seeking a whole lot of money,  the network: victim, Hackers: attacker, its rightful owners: 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: are seeking a whole lot of money,  the network: victim, Hackers: attacker, its rightful owners: victim) 