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: POP CULTURE 
Clue: Neil Diamond's 1982 hit "Heartlight" was inspired by this movie

SOLUTION: e.t.

PROBLEM: Category: SOUP ALPHABET 
Clue: "B" is for this thin soup; Swanson's makes beef, chicken & vegetable varieties

SOLUTION: broth

PROBLEM: Category: EAST ASIAN CITIES 
Clue: Also called Guangzhou, for almost a century it was the only Chinese port open to foreign trade

SOLUTION:
canton