636
The United States quickly became the Southeast Asian country ' s main weapons supplier , and annual arms sales peaked at US $ 400 million in the 1980s .
 arms: artifact; United States: seller; country: 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:
 arms: artifact; United States: seller; country: buyer