980
Ominously , they also took a prison where they found U . S . Army uniforms and chemical weapons suits possibly belonging to American POWs .
 prison: artifact; they: buyer
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: transfer ownership 
  Option: artifact, seller, place, beneficiary, buyer 
Text: {0} 
Answer:
 prison: artifact; they: buyer