Question: The proton pack was first depicted in the film "Ghostbusters", an American supernatural comedy film directed and produced by Ivan Reitman and written by Dan Aykroyd and Harold Ramis and released in what year?
Sentence (from "Ghostbusters"): Sigourney Weaver and Rick Moranis co-star as a client and her neighbor, and Ernie Hudson as the Ghostbusters' first recruit.
Relevant evidence: No