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.

Ex Input:
who wrote the movie Blackboards?

Ex Output:
Mohsen Makhmalbaf, Samira Makhmalbaf, Zaheer Qureshi


Ex Input:
what was the popularity rating of Western?

Ex Output:
unknown


Ex Input:
who is the writer of Texas Across the River?

Ex Output:

Wells Root, Ben Starr, Harold Greene