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 In a briefing for reporters , Lt. Gen. John F. Sattler , a senior aide to the Joint Chiefs of Staff , said the Baghdad operation had been constrained because the Iraqi government had not allowed American and Iraqi troops to '' go in and neutralize Sadr City , '' the base for the Mahdi Army . 
 location contains: Baghdad, Sadr City
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: Baghdad, Sadr City