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.
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: Gulf, Marines, U.S., U.S., Saudi Arabia, U.S. 
Answer:
 location: Gulf; else: Marines; location: U.S.; location: U.S.; location: Saudi Arabia; location: U.S.