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All told , the pair inflicted harm on more than 200 victims across the country and collected roughly $ 6 million in ransom over a three year period dating back to 2015 .
 $ 6 million: price; victims: victim; inflicted harm: attack pattern; the pair: attacker; over a three year: time; 2015: 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:
 $ 6 million: price; victims: victim; inflicted harm: attack pattern; the pair: attacker; over a three year: time; 2015: time