Question: Who directed a 1996 American science fiction Western film starring an actress best known for her role on Cheers as Kelly Gaines?
Sentence (from "Back to the Future Part III"): The film continues immediately following "Back to the Future Part II" (1989); while stranded in 1955 during his time travel adventures, Marty McFly (Fox) discovers that his friend Dr. Emmett "Doc" Brown, trapped in 1885, was killed by Biff Tannen's great-grandfather Buford.
Relevant evidence: No