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: SUN 
Clue: In the main reaction making the sun's energy, 2 of these nuclear particles fuse & one becomes a neutron

SOLUTION: protons

PROBLEM: Category: AMERICAN HISTORY 
Clue: Frances Willard, a president of the WCTU, was the first woman honored in this Capitol building hall

SOLUTION: statuary hall

PROBLEM: Category: CHOOSE A "CIDE" 
Clue: Final act of playwrights Seneca & von Kleist

SOLUTION:
suicide