2955
A county commissioner says that the virus demanded a payment in Bitcoin for the county to regain control of their systems .
 the county: victim; their systems: victim; the virus: tool; in Bitcoin: 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:
 the county: victim; their systems: victim; the virus: tool; in Bitcoin: payment method