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The puzzling part about Ransomware is that , no matter what the situation is , even if the ransom is paid , there is no guarantee that computer users will be able to fully access their systems ever again .
 Ransomware: tool; computer users: victim; their systems: 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:
 Ransomware: tool; computer users: victim; their systems: victim