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But Michael O ' Hanlon of the Brookings Institution in Washington said the apparent collapse of Republican Guard resistance could deprive Hussein of much of the wallop he was counting on in the city .
 Washington, the city, the Brookings Institution in Washington, Republican Guard, Michael O ' Hanlon of the Brookings Institution in Washington, Hussein, he
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:
 Washington, the city, the Brookings Institution in Washington, Republican Guard, Michael O ' Hanlon of the Brookings Institution in Washington, Hussein, he