6538
 Russia 's announced choice of a theme for the meeting , energy security , turned into an embarrassment earlier this year after the authorities nearly shut off the supply of natural gas to Europe in the middle of winter after a dispute with Ukraine over prices . 
 location contains: Europe, Ukraine
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: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 location contains: Europe, Ukraine