3085
The department says the infection was discovered on December 12 , last year , and the crooks asked for a $ 4,000 ransom fee to unlock the files .
 $ 4,000: price; the crooks: attacker; December 12 , last year: time
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:
 $ 4,000: price; the crooks: attacker; December 12 , last year: time