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Over the past few weeks , hackers have targeted thousands of publicly accessible servers running database software such as MongoDB and Hadoop , and held their data for ransom .
 the past few weeks: time; hackers: attacker; servers running database software: victim; MongoDB: victim; Hadoop: victim; held their data: attack pattern
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:
 the past few weeks: time; hackers: attacker; servers running database software: victim; MongoDB: victim; Hadoop: victim; held their data: attack pattern