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.

Input: Consider Input: Category: LARGE EQUIPMENT
Clue: For smooth travel, ballast tampers & ballast regulators keep the gravel at the right level among these

Output: railroad tracks

Input: Consider Input: Category: POP MUSIC RHYME TIME
Clue: Mr. Vicious' offspring

Output: sid's kids

Input: Consider Input: Category: FOR SAX AND VIOLINS
Clue: Naturally, Sidney Sax played violin on this Beatles hit with "all the lonely people"
Output: "eleanor rigby"