1441
Rumsfeld said the Army was sparing no expense or effort to acquire as many Humvees and other vehicles with extra armor as it can .
 Humvees: artifact; vehicles: artifact; Army: 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:
 Humvees: artifact; vehicles: artifact; Army: buyer