1848
Carleton was the victim of a ransomware attack in November of last year , which locked down dozens of computers that would only unlock if the university paid a ransom in bitcoin .
 the university: victim; in bitcoin: payment method; locked down dozens of computers: attack pattern
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 university: victim; in bitcoin: payment method; locked down dozens of computers: attack pattern