In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

[EX Q]: Most archaeologists believe that Machu Picchu was constructed as an estate for the Inca emperor Pachacuti (1438 -- 1472). Often mistakenly referred to as the 'Lost City of the Incas' (a title more accurately applied to Vilcabamba), it is the most familiar icon of Inca civilization. The Incas built the estate around 1450 but abandoned it a century later at the time of the Spanish Conquest. Although known locally, it was not known to the Spanish during the colonial period and remained unknown to the outside world until American historian Hiram Bingham brought it to international attention in 1911.
[EX A]: what is the lost city of the incas

[EX Q]: Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons. It is done so that the soil of farms is not used for only one set of nutrients. It helps in reducing soil erosion and increases soil fertility and crop yield.
[EX A]: why do farmers rotate crops in the field

[EX Q]: In the United States, table wine primarily designates a wine style: ordinary wine which is neither fortified nor sparkling nor expensive.
[EX A]:
what's the difference between table wine and regular wine