7714
we begin south of baghdad , - - - where u . s . troops have found - - f | - what may be chemical - - - - weapons materials .
 baghdad, u . s, we, u . s . troops, baghdad , - - - where u . s . troops have found - - f | - what may be chemical - - - - weapons materials, where, chemical - - - - weapons
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, we, u . s . troops, baghdad , - - - where u . s . troops have found - - f | - what may be chemical - - - - weapons materials, where, chemical - - - - weapons