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This inflicted vastly more damage than the last well - documented online scam to successfully target an Alberta post-secondary school : last year , University of Calgary paid $ 20,000 in what ’s known as a ransomware attack , in which cyberattackers manage to lock or encrypt network data until the victim pays up .
 $ 20,000: price; last year: time; University of Calgary: 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:
 $ 20,000: price; last year: time; University of Calgary: victim