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Hospital administrators found the systems locked , with an encrypted message by unidentified attackers demanding ransom in Bitcoins to unlock it , said Tushar Doshi , Deputy Commissioner of Police ( Crime ) .
 unidentified attackers: attacker; in Bitcoins: payment method; the systems locked , with an encrypted message: attack pattern; Hospital administrators: 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:
 unidentified attackers: attacker; in Bitcoins: payment method; the systems locked , with an encrypted message: attack pattern; Hospital administrators: victim