Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Example Input: The American television series 'The Lone Gunmen', which centred on a group of investigators who ran a conspiracy theory magazine, was a spin-off of which other succesful series?
Example Output: the x-files

Example Input: Jean-Claude Van Damme plays both of the twins, separated after the death of their parents, in which 1991 film?
Example Output: double impact

Example Input: Which intelligence agency was founded in 1951 by Isser Harel who served as its director until 1963?
Example Output:
mossad