Detailed Instructions: You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
Q: Context : The other games in the ''Gold Box'' series used the game engine pioneered in Pool of Radiance, as did later D&D titles such as the Neverwinter Nights online game.
Subject : Pool of Radiance
Relation : based on
A:
The Pool of Radiance is based upon what?