1053
An amount in Bitcoin ( BTC ) is what the Canadian town of Midland is said to have paid to regain access to its hacked computer systems .
 computer systems: victim; the Canadian town of Midland: victim; in Bitcoin ( BTC ): payment method
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:
 computer systems: victim; the Canadian town of Midland: victim; in Bitcoin ( BTC ): payment method