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The hacks targeted government ministries , banks , utilities and other important infrastructure and companies nationwide , demanding ransoms from government employees in the cryptocurrency bitcoin .
 ( ransom: demanding ransoms,  in the cryptocurrency bitcoin: payment method, government ministries: victim, banks: victim, other important infrastructure: victim, companies nationwide: victim, government employees: victim, utilities: victim, hacks: 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: demanding ransoms,  in the cryptocurrency bitcoin: payment method, government ministries: victim, banks: victim, other important infrastructure: victim, companies nationwide: victim, government employees: victim, utilities: victim, hacks: attacker) 