This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
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Question: Passage: Roman Catholics believe in the Immaculate Conception of Mary, as proclaimed Ex Cathedra by Pope Pius IX in 1854, namely that she was filled with grace from the very moment of her conception in her mother's womb and preserved from the stain of original sin. The Latin Rite of the Roman Catholic Church has a liturgical feast by that name, kept on December 8. Orthodox Christians reject the Immaculate Conception dogma principally because their understanding of ancestral sin (the Greek term corresponding to the Latin "original sin") differs from the Augustinian interpretation and that of the Roman Catholic Church.

Answer: On what day did Mary attend The Latin Rite of the Roman Catholic Church liturgical feast?


Question: Passage: Since World War II, aircraft carrier designs have increased in size to accommodate a steady increase in aircraft size. The large, modern Nimitz class of US carriers has a displacement nearly four times that of the World War II–era USS Enterprise, yet its complement of aircraft is roughly the same—a consequence of the steadily increasing size and weight of military aircraft over the years. Today's aircraft carriers are so expensive that nations which operate them risk significant political, economic, and military impact if a carrier is lost, or even used in conflict.

Answer: Why have aircraft carriers increased in size since World War I?


Question: Passage: In this last connection, the name could suggest the derogatory inference of superstitious worship; popular fancy held that Huguon, the gate of King Hugo, was haunted by the ghost of le roi Huguet (regarded by Roman Catholics as an infamous scoundrel) and other spirits, who instead of being in Purgatory came back to harm the living at night. It was in this place in Tours that the prétendus réformés ("these supposedly 'reformed'") habitually gathered at night, both for political purposes, and for prayer and singing psalms. Such explanations have been traced to the contemporary, Reguier de la Plancha (d. 1560), who in De l'Estat de France offered the following account as to the origin of the name, as cited by The Cape Monthly:

Answer:
In what year was Huguon built?