23788
 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 options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Prague, Wenceslas Square 
Answer:
 location contains: Prague, Wenceslas Square