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: SCIENCE FICTION 
Clue: A recent re-issue of this Sir Arthur Conan Doyle novel includes an introduction by Michael Crichton

SOLUTION: the lost world

PROBLEM: Category: HISTORIC SPEECHES 
Clue: He said, "We look forward to a world founded upon" freedom of speech, of worship, from want & from fear

SOLUTION: franklin delano roosevelt

PROBLEM: Category: PRESIDENTIAL ELECTIONS 
Clue: Since 1820, 1 of 3 men to lose a presidential election but win the rematch with the same individual 4 years later

SOLUTION:
 andrew jackson, william henry harrison or grover cleveland