Instructions: Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Input: Context : Three Doors to Death is a collection of Nero Wolfe mystery novellas by Rex Stout, published by the Viking Press in 1950 -- itself collected in the omnibus volume Five of a Kind (Viking 1961).
Answer : Nero Wolfe
Output:
The Three Doors to Death is part of a what series?