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: TRANSPORTATION 
Clue: In the 19th century Gustavus Swift developed this type of railway car to preserve his packed meat

SOLUTION: refrigerator car

PROBLEM: Category: INITIALS M.S. 
Clue: She was in the TV miniseries "Holocaust" & starred in the Holocaust film "Sophie's Choice"

SOLUTION: meryl streep

PROBLEM: Category: WHAT'S ON YOUR HEAD? 
Clue: Also known as a silk hat, it's worn by Mr. Peanut & Edgar Bergen's dummy Charlie McCarthy

SOLUTION:
a top hat