Question: Patriot Games is a spy thriller film, acted in by Harrison ford that is based on what?
Sentence (from "Harrison Ford"): Ford is also known for his roles as Rick Deckard in the neo-noir dystopian science fiction film "Blade Runner" (1982); John Book in the thriller "Witness" (1985), for which he was nominated for the Academy Award for Best Actor; and Jack Ryan in the action films "Patriot Games" (1992) and "Clear and Present Danger" (1994).
Relevant evidence: Yes