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: EUROPEAN CAPITALS 
Clue: It's home to the Swiss Parliament

SOLUTION: bern

PROBLEM: Category: ANIMALS 
Clue: These mollusks, not oysters, are the most common source for freshwater pearls

SOLUTION: mussels

PROBLEM: Category: HIS PRO TEAM RIGHT BEFORE... 
Clue: ...before Joe Montana played for the Chiefs

SOLUTION:
the 49ers