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Faramarz Shahi Savandi and Mohammed Mehdi Shah Mansouri are accused of using the Samsam ransomware to encrypt files on 3,789 City of Atlanta computers , including servers and workstations , in an attempt to extort Bitcoin from Atlanta officials .
 Atlanta officials: victim; Bitcoin: payment method; workstations: victim; servers: victim; computers: victim; encrypt files: attack pattern; Faramarz Shahi Savandi: attacker; Mohammed Mehdi Shah Mansouri: attacker; City of Atlanta: victim; the Samsam ransomware: 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:
 Atlanta officials: victim; Bitcoin: payment method; workstations: victim; servers: victim; computers: victim; encrypt files: attack pattern; Faramarz Shahi Savandi: attacker; Mohammed Mehdi Shah Mansouri: attacker; City of Atlanta: victim; the Samsam ransomware: tool