Question: What award was won in 1973 by the actress that played a character in a horror film based on a novel by Peter Blatty?
Sentence (from "Regan MacNeil"): Regan Teresa MacNeil (born November 11, 1961; adaptations: c. September 1963) is a fictional character from William Peter Blatty's horror novel and film, "The Exorcist" and its first sequel, "".
Relevant evidence: Yes