instruction:
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.
question:
Context : Gelnhausen railway (Hungen--Gießen) was opened on 29 December 1869 and Hungen station went into operation. 
Answer : 29 December 1869
answer:
When was Hungen station opened?


question:
Context : In May 2011 Metismo was acquired by Software AG for an undisclosed amount. 
Answer : Software AG
answer:
What company is Metismo part of?


question:
Context : Rama VII Bridge (Thai: สะพานพระราม 7) is a bridge over the Chao Phraya River in Bangkok and Nonthaburi, in Thailand, connecting the districts Bang Sue and Bang Phlat. 
Answer : Chao Phraya River
answer:

What river does Rama VII Bridge cross?