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` ` The key endgame may be whether the U . S . can parse out the key regime centers of power in Baghdad and attack them without having to fight into the city , or at least locate them well enough to atman of the Center for Strategic and International Studies said in his daily war report .
 the U . S, Baghdad, the city, regime, the Center for Strategic and International Studies, atman of the Center for Strategic and International Studies, his, the key regime centers of power in Baghdad, them, them
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 the U . S, Baghdad, the city, regime, the Center for Strategic and International Studies, atman of the Center for Strategic and International Studies, his, the key regime centers of power in Baghdad, them, them