3147
The 23,000 U.S. military people already in the Gulf consist of 15,000 sailors and Marines , 6,000 U.S. servicemen based primarily in Saudi Arabia and 2,000 U.S. troops in the area for military exercises .
 location: Gulf; else: Marines; location: U.S.; location: U.S.; location: Saudi Arabia; location: U.S.
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 location: Gulf; else: Marines; location: U.S.; location: U.S.; location: Saudi Arabia; location: U.S.