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This is when computer systems are hacked by criminals who then demand a sum of money to avoid a major city having its power cut off .
 criminals: attacker; a major city: victim; computer systems are hacked: attack pattern; a sum of money: price; having its power cut off: attack pattern
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: ransom 
  Option: victim, attacker, payment method, attack pattern, damage amount, tool, time, price, place 
Text: {0} 
Answer:
 criminals: attacker; a major city: victim; computer systems are hacked: attack pattern; a sum of money: price; having its power cut off: attack pattern