You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the 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"?" whose answer is 2005.
Each document should contain about 30 words, and these documents should contain useful information.

Query: release year of Serenity Role Playing Game
Useful Output:

Doc 1: Publication date: 2005. Topics: Tabletop RPG, tabletop Role-playing game, Serenity, Joss Whedon, Jamie Chambers, Science-fiction game, sci-fi
Doc 2:  Serenity Role Playing Game is a science fiction role-playing game released in 2005 and set in the universe of the movie Serenity. It was
Doc 3: Serenity Role Playing Game is a science fiction role-playing game released in 2005 and set in the universe of the movie Serenity.
Doc 4: Technically speaking, I didn't actually discover the Serenity RPG until 2007 when I got the Battlestar Galactica Role Playing Game (Margaret
Doc 5: Title: Serenity Role Playing Game Author: Jamie Chambers Rule Set: Cortex Year: 2005. Pages: 230. Number of players: 2 or more. Rating