2013
The attackers demanded the equivalent of $ 51,000 in digital currency to unlock the system .
 The attackers: attacker; $ 51,000: price; in digital currency: payment method; system: 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:
 The attackers: attacker; $ 51,000: price; in digital currency: payment method; system: victim