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: '70s MUSIC 
Clue: This jazz-rock group gave us the songs "25 or 6 to 4" & "Does Anybody Really Know What Time It Is?"

SOLUTION: chicago

PROBLEM: Category: ANCIENT TIMES 
Clue: Julius Caesar said this region was divided into 3 parts; Augustus divided it into 4, including Aquitania

SOLUTION: gaul

PROBLEM: Category: FAST FOOD CHAINS IN OTHER WORDS 
Clue: The Tube

SOLUTION:
subway