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The ransom note provided a bitcoin address to pay the ransom and a website accessible only on the dark web , where it said the city could retrieve the decryption key , prosecutors said .
 a bitcoin address: payment method; The ransom note: tool
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:
 a bitcoin address: payment method; The ransom note: tool