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In U.S. political jargon , a " smoke-filled room " ( sometimes called a " smoke-filled back room " ) is a secret political gathering or round-table-style decision-making process .
 location: U.S.
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: U.S.