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If more machines are locked by the ransomware , half will be decrypted for 6 BTC ( $ 16,400 ) , and for all of them , a total of 12 BTC , or $ 32,800 , is demanded .
 ( ransom: is demanded,  $ 32,800: price, 12 BTC: price, $ 16,400: price, 6 BTC: price, machines: victim, are locked by the ransomware: 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: is demanded,  $ 32,800: price, 12 BTC: price, $ 16,400: price, 6 BTC: price, machines: victim, are locked by the ransomware: attack pattern) 