6670
The last remaining assets of bankrupt Russian oil company  Yukos  including its headquarters in  Moscow  were sold at auction for nearly 3.9 billion U.S. dollars Friday .
 city of headquarters: Yukos, Moscow
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 city of headquarters: Yukos, Moscow