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: MILITARY HISTORY 
Clue: Lasting about a month, it's the battle for which the most marines earned the Medal of Honor

SOLUTION: iwo jima

PROBLEM: Category: STATE CAPITALS 
Clue: This Southern capital was named for an ancestor of a 20th century poet known for his clever rhymes

SOLUTION: nashville, tennessee

PROBLEM: Category: SCIENTIFIC DISCOVERIES 
Clue: In 1919, barely 20 years after its discovery, it was the world's most expensive substance at $3 million an ounce

SOLUTION:
radium