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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: LARGE EQUIPMENT 
Clue: For smooth travel, ballast tampers & ballast regulators keep the gravel at the right level among these

SOLUTION: railroad tracks

PROBLEM: Category: HOUSE STANDING COMMITTEES 
Clue: There's a Permanent Select Committee on this headed by Porter Goss; how smart!

SOLUTION: intelligence

PROBLEM: Category: NATIONAL ANTHEMS 
Clue: "La Brabanconne" is the national anthem of this Low Country

SOLUTION:
belgium