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Brooks provided scant details of the operation that netted Barzan Ibrahim , saying he was taken inside Baghdad and that U . S . special forces were aided by Marines .
 Baghdad, U . S, Brooks, Barzan Ibrahim, he, U . S . special forces, Marines
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:
 Baghdad, U . S, Brooks, Barzan Ibrahim, he, U . S . special forces, Marines