12230
Counter - demonstrations in support of the US - led invasion of Iraq took place in some cities , with some 2 , 500 people turning out in Chicago .
 US, Iraq, some cities, Chicago, some 2 , 500 people
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:
 US, Iraq, some cities, Chicago, some 2 , 500 people