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 : Preparing for a Fancy Dress Ball, also known as The Misses Williams-Wynn, is a 173 by 150 cm (68 by 59 in) oil on canvas by English artist William Etty, first exhibited in 1835 and currently in the York Art Gallery. 
Answer : York Art Gallery
answer:
What is the name of the place where Preparing for a Fancy Dress Ball can be found?


question:
Context : Michelle D. Johnson is a Lieutenant General in the United States Air Force and is the 19th Superintendent of the United States Air Force Academy. 
Answer : United States Air Force
answer:
Which military branch is Michelle D. Johnson a part of?


question:
Context : Cargolux Flight 7933 was a cargo flight which was involved in an accident on 21 January 2010 in which it landed on a vehicle that was on an active runway. 
Answer : 21 January 2010
answer:

On what date did Cargolux Flight 7933 take place?