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: Ziggurats (Sumerian temples) each had an individual name and consisted of a forecourt, with a central pond for purification. The temple itself had a central nave with aisles along either side. Flanking the aisles would be rooms for the priests. At one end would stand the podium and a mudbrick table for animal and vegetable sacrifices. Granaries and storehouses were usually located near the temples. After a time the Sumerians began to place the temples on top of multi-layered square constructions built as a series of rising terraces, giving rise to the Ziggurat style.

Answer: What feature of temples provided fresh drinking water?


Question: Passage: Groups share a fundamental kinship with the notion of symmetry. For example, a symmetry group encodes symmetry features of a geometrical object: the group consists of the set of transformations that leave the object unchanged and the operation of combining two such transformations by performing one after the other. Lie groups are the symmetry groups used in the Standard Model of particle physics; Point groups are used to help understand symmetry phenomena in molecular chemistry; and Poincaré groups can express the physical symmetry underlying special relativity.

Answer: What encodes a symmetry group?


Question: Passage: Cubist sculpture developed in parallel to Cubist painting. During the autumn of 1909 Picasso sculpted Head of a Woman (Fernande) with positive features depicted by negative space and vice versa. According to Douglas Cooper: "The first true Cubist sculpture was Picasso's impressive Woman's Head, modeled in 1909–10, a counterpart in three dimensions to many similar analytical and faceted heads in his paintings at the time." These positive/negative reversals were ambitiously exploited by Alexander Archipenko in 1912–13, for example in Woman Walking. Joseph Csaky, after Archipenko, was the first sculptor in Paris to join the Cubists, with whom he exhibited from 1911 onwards. They were followed by Raymond Duchamp-Villon and then in 1914 by Jacques Lipchitz, Henri Laurens and Ossip Zadkine.

Answer:
What was the name of the 1907 Cubist sculpture Picassos created?