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: IN THE TEENS 
Clue: One of these "wheelers" is a large tractor-trailer truck rig

SOLUTION: 18-wheeler

PROBLEM: Category: 19th CENTURY LITERARY QUOTES 
Clue: This vessel under Captain Nemo was "cigar in shape" with "two hulls, one inside, the other outside"

SOLUTION: the nautilus

PROBLEM: Category: MUSICAL THEATER 
Clue: It was billed as "The American Tribal Love-Rock Musical"

SOLUTION:
"hair"