Question: The Cortex System is a generic RPG system based on the "Sovereign Stone System ", and was developed by Margaret Weis Productions, Ltd for the Serenity Role Playing Game, a science fiction role-playing game released in which year, and set in the universe of the movie "Serenity"?
Sentence (from "Firefly Role-Playing Game"): The Firefly Role-Playing Game is a science fiction role-playing game released in 2014 and set in the universe of the Joss Whedon television show "Firefly".
Relevant evidence: No