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a lot of bridges between where the 3 7 cavalry and the rest of the u . s . forces are now and their ultimate destination , downtown baghdad .
 u . s, the 3 7 cavalry, the rest of the u . s . forces, the u . s . forces, their, a lot of bridges between where the 3 7 cavalry and the rest of the u . s . forces are now and their ultimate destination , downtown baghdad, where the 3 7 cavalry and the rest of the u . s . forces are now, their ultimate destination, downtown 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, the 3 7 cavalry, the rest of the u . s . forces, the u . s . forces, their, a lot of bridges between where the 3 7 cavalry and the rest of the u . s . forces are now and their ultimate destination , downtown baghdad, where the 3 7 cavalry and the rest of the u . s . forces are now, their ultimate destination, downtown baghdad