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Then , they threaten to trigger a major leak or explosion if the plant owners do n’t pay up : $ 50 million in bitcoin .
 they: attacker; threaten to trigger a major leak or explosion: attack pattern; the plant owners: victim; $ 50 million: price; in bitcoin: payment method
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:
 they: attacker; threaten to trigger a major leak or explosion: attack pattern; the plant owners: victim; $ 50 million: price; in bitcoin: payment method