You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: NASHVILLE 
Clue: A tribute album to this late singer includes Elton John singing "Stand By Your Man"
tammy wynette

Category: TO THE "LEFT" HAND SIDE 
Clue: Artsy southern section of Paris
the left bank

Category: U.S. PRESIDENTS 
Clue: He was named for his maternal grandfather James Knox, a Revolutionary War captain

polk