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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: THE RUSSIANS ARE COMING 
Clue: On April 14, 1961 this cosmonaut was awarded the honor "Hero of the Soviet Union"

SOLUTION: gagarin

PROBLEM: Category: PARADISE LOST 
Clue: Completes the famous line from Book I, "Better to reign in hell, than..."

SOLUTION: serve in heaven

PROBLEM: Category: 1902 
Clue: In August this "Junior", son of a physician, poet & essayist, was appointed to the Supreme Court

SOLUTION:
oliver wendell holmes