Generate a correct and concise answer for the question based on the words in the context.

[EX Q]: Context : The 2007 Balad aircraft crash was a 9 January 2007 airplane incident involving an Antonov An-26 airliner, which crashed while attempting to land at the Joint Base Balad in Balad, Iraq, which was at that time operated by the United States Air Force.
Question : On what date did 2007 Balad aircraft crash occur?
[EX A]: 9 January 2007

[EX Q]: Context : Zoe Zaoutzaina (died May 899) was the second wife of the Byzantine emperor Leo VI the Wise.
Question : What is Zoe Zaoutzaina's spouse's name?
[EX A]: Leo VI the Wise

[EX Q]: Context : ''The Reichenbach Fall'' is the third and final episode of the second series of the BBC television series Sherlock.
Question : What is the series that The Reichenbach Fall is a part of?
[EX A]:
Sherlock