2470
He said U . S . forces expect to get one of the city ' s power grids on line by Friday .
 U . S, the city, He, U . S . forces
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 city, He, U . S . forces