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Affected were a Russian oil giant , a Danish shipping and energy conglomerate , and Ukrainian government ministries , which were brought to a standstill in a wave of ransom demands .
 a Russian oil giant: victim; a Danish shipping and energy conglomerate: victim; Ukrainian government ministries: 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:
 a Russian oil giant: victim; a Danish shipping and energy conglomerate: victim; Ukrainian government ministries: victim