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 1970s MUSIC SCENE 
Clue: The 1972 film "Fillmore" chronicled the closing of promoter Bill Graham's Fillmore West in this city

SOLUTION: san francisco

PROBLEM: Category: LET'S TAKE A TRIP 
Clue: When this country broke away from Ethiopia in 1993, Haile Selassie Avenue in the capital became Harnet Avenue

SOLUTION: eritrea

PROBLEM: Category: "Y"? 
Clue: You can split the atom or even do barrel rolls using this toy

SOLUTION:
a yo-yo