instruction:
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 consistency, answers should be in all lower cased letters.
question:
Category: ANIMALS 
Clue: Types of this aquatic creature include chimney, sheep's wool, and common bath
answer:
the sponge


question:
Category: MOVIE MR. & MRS. 
Clue: It's the title couple played by Brad Pitt & Angelina Jolie in a 2005 movie
answer:
mr. & mrs. smith


question:
Category: AMERICAN CITIES 
Clue: "Earthquake City" & "Baghdad by the Bay" are 2 nicknames of this California city
answer:

san francisco