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What is certain is that Mr. Briantsev , 57 , the artistic director of Moscow 's Stanislavsky and Nemirovich-Danchenko Ballet , stepped out of his hotel near Wenceslas Square in Prague on June 28 and has not been seen since . ''
 location contains: Prague, Wenceslas Square
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: 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} 
Answer:
 location contains: Prague, Wenceslas Square