1421
Auctioneers reported a $ 9 . 3 billion winning bid for Yuganskneftgaz -- the company ' s main asset , worth two to three times that amount -- by an anonymous company located in Tver .
 Yuganskneftgaz: artifact; company: seller; company: 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:
 Yuganskneftgaz: artifact; company: seller; company: buyer