2899
At the same time , US forces in two gulf countries have been put on alert against possible terrorist action .
 US, two gulf countries, US forces in two gulf countries, terrorist, gulf
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 US, two gulf countries, US forces in two gulf countries, terrorist, gulf