Question: The 2013 documentary "I Know That Voice" featured what famous actor, known for voice roles as Cindy Lou Who and Rocky the Flying Squirrel?
Sentence (from "Ray Dennis Steckler"): Ray Dennis Steckler (January 25, 1938 – January 7, 2009), also known by the pseudonym Cash Flagg, was an American film director, producer, screenwriter and actor best known as the low-budget auteur of such cult films as "The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies".
Relevant evidence: No