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The hackers could then lock these computers up and demand a ransom or else cause a blackout or poison the city 's water .
 lock these computers up: attack pattern; The hackers: attacker; city: victim
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:
 lock these computers up: attack pattern; The hackers: attacker; city: victim