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: THE CIVIL WAR
Clue: A century before the U.S.S. Nautilus, the Confederacy had 2 of these new ships, the Pioneer & the Hunley

SOLUTION: submarines

PROBLEM: Category: 1791
Clue: He published the first part of "The Rights of Man" in England & was later charged with treason

SOLUTION: thomas paine

PROBLEM: Category: GOAT-POURRI
Clue: Goat Island splits Niagara Falls into the American Falls & this waterfall on the Canadian side

SOLUTION:
horseshoe falls