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TIM EWART , ITN CORRESPONDENT These are soldiers of the U . S . 3rd Infantry , fighting near Karbala , southwest of Baghdad .
 U . S, Karbala, Baghdad, the U . S . 3rd Infantry, These, soldiers of the U . S . 3rd Infantry , fighting near Karbala , southwest of Baghdad
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:
 U . S, Karbala, Baghdad, the U . S . 3rd Infantry, These, soldiers of the U . S . 3rd Infantry , fighting near Karbala , southwest of Baghdad