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.

Input: Consider Input: Passage: Cork is home to the RTÉ Vanbrugh Quartet, and to many musical acts, including John Spillane, The Frank And Walters, Sultans of Ping, Simple Kid, Microdisney, Fred, Mick Flannery and the late Rory Gallagher. Singer songwriter Cathal Coughlan and Sean O'Hagan of The High Llamas also hail from Cork. The opera singers Cara O'Sullivan, Mary Hegarty, Brendan Collins, and Sam McElroy are also Cork born. Ranging in capacity from 50 to 1,000, the main music venues in the city are the Cork Opera House (capacity c.1000), Cyprus Avenue, Triskel Christchurch, the Roundy, the Savoy and Coughlan's.[citation needed] Cork's underground scene is supported by Plugd Records.[citation needed]

Output: What Opera singers currently lives in Cork?


Input: Consider Input: 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.

Output: What feature of temples provided fresh drinking water?


Input: Consider Input: Passage: Uranium ore is mined in several ways: by open pit, underground, in-situ leaching, and borehole mining (see uranium mining). Low-grade uranium ore mined typically contains 0.01 to 0.25% uranium oxides. Extensive measures must be employed to extract the metal from its ore. High-grade ores found in Athabasca Basin deposits in Saskatchewan, Canada can contain up to 23% uranium oxides on average. Uranium ore is crushed and rendered into a fine powder and then leached with either an acid or alkali. The leachate is subjected to one of several sequences of precipitation, solvent extraction, and ion exchange. The resulting mixture, called yellowcake, contains at least 75% uranium oxides U3O8. Yellowcake is then calcined to remove impurities from the milling process before refining and conversion.


Output: What percentage range of uranium dioxide is usually contained in low-grade uranium ore?