3656
it ' s cannon , it ' s ability to implace troops and fire through the firing ports in that bradley vehicle to take them in under protection .
 troops, them, it, it, that bradley vehicle, it ' s cannon
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:
 troops, them, it, it, that bradley vehicle, it ' s cannon