46121
It said that although Russia would most likely still be the primary supplier of advanced weapons to China , with Europe acting as '' an emerging supplier , '' the new sales would also '' enhance China 's leverage in negotiating purchases , '' making even more advanced weapons systems and technology available .
 location contains: Europe, Russia
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Europe, Russia 
Answer:
 location contains: Europe, Russia