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There were 162 rigs under contract in the U.S. Gulf as of August 30 , down one from the prior week , Offshore Data Services said .
 organization: Offshore Data Services; location: U.S. Gulf
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:
 organization: Offshore Data Services; location: U.S. Gulf