TASK DEFINITION: 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.
PROBLEM: Category: COLLECTIBLES 
Clue: When he moved into the White House, George W. Bush brought some of his over 150 autographed ones of these

SOLUTION: baseballs

PROBLEM: Category: AMERICAN POETRY 
Clue: Walt Whitman called this "the beautiful uncut hair of graves"

SOLUTION: grass

PROBLEM: Category: WORDS 
Clue: It's the common English word that is pronounced differently when it becomes the name of a language

SOLUTION:
polish/polish