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.

[Q]: Official Catholic accounts state that the Virgin Mary appeared four times before Juan Diego and one more before Juan Diego's uncle. According to these accounts the first apparition occurred on the morning of December 9, 1531, when a native Mexican peasant named Juan Diego saw a vision of a maiden at a place called the Hill of Tepeyac, which would become part of Villa de Guadalupe, a suburb of Mexico City. Speaking to Juan Diego in his native Nahuatl language (the language of the Aztec empire), the maiden identified herself as the Virgin Mary, 'mother of the very true deity' and asked for a church to be built at that site in her honor.
[A]: who did our lady of guadalupe appeared to


[Q]: Professor X is the founder of Xavier's School for Gifted Youngsters at a location commonly called the X-Mansion, which recruits mutants from around the world. Located in Westchester County, New York, the X-Mansion is the home and training site of the X-Men. The founding five members of the X-Men who appear in The X-Men #1 (September 1963) are Angel (Archangel), Beast, Cyclops, Iceman, and Marvel Girl (Jean Grey); Professor X and Magneto also made their first appearances in The X-Men #1. Since then, dozens of mutants from various countries and diverse backgrounds have held membership as X-Men.
[A]: who joined the x-men in x-men #1 from 1963


[Q]: In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space. The energy that occupies the same volume, in the form of electromagnetic radiation, is the interstellar radiation field.
[A]:
what do we mean by the interstellar medium


