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: Consider Input: Context : Gelnhausen railway (Hungen--Gießen) was opened on 29 December 1869 and Hungen station went into operation. 
Answer : 29 December 1869

Output: When was Hungen station opened?


Input: Consider Input: Context : NGC 2241 is an open cluster in the constellation Dorado. 
Answer : Dorado

Output: What constellation does NGC 2241 belong to?


Input: Consider Input: Context : Mary Sally Matiella was educated at the University of Arizona, receiving a B.A. in 1973 and an M.B.A. in 1976. 
Answer : University of Arizona


Output: Which college or university is related with Mary Sally Matiella?