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: "What system was developed by Margaret Weis Productions was used in a game based on the Supernatural TV series?" whose answer is The Cortex System.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Margaret Weis Productions Supernatural game
Useful Output:

Doc 1: Supernatural Role Playing Game is a complete modern action horror system (powered by the Cortex System) written by Jamie Chambers and published
Doc 2: Digimon TCG: Resurgence Booster - Booster Box RB-01. $37.97. $119.76 ; Dragon Ball Super TCG: Unison Warrior Series 02 - Vermilion Bloodline B11 - Booster Box.
Doc 3: Leverage: The Roleplaying Game. M. Marvel Heroic Roleplaying. S. Serenity Role Playing Game · Smallville Roleplaying Game · Supernatural Role Playing Game.
Doc 4: We are perhaps best known for our licensed games created from the worlds of Dragonlance, Serenity, Supernatural, Battlestar Galactica,
Doc 5: Margaret Weis Productions, the troubled publisher behind licensed RPGs based on Firefly, Marvel, Battlestar Galactica, Serenity, Smallville