TASK DEFINITION: You are given an open-domain question from an open movie database. Your task is to provide an answer to that question. Try to only include the answer. Do not put it in a sentence.
PROBLEM: what does Mercedes McNab appear in?

SOLUTION: Thirst

PROBLEM: how popular of a movie is The Hound of the Baskervilles?

SOLUTION: unknown

PROBLEM: who stars in Nightmare Castle?

SOLUTION:
Barbara Steele, Marino Masé, Paul Muller, Helga Liné