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.

Q: 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]

A: What Opera singers currently lives in Cork?
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Q: Passage: On 7 February 2007, the French Parliament passed a bill granting COM status to both St. Barthélemy and (separately) to the neighbouring Saint Martin. The new status took effect on 15 July 2007, when the first territorial council was elected, according to the law. The island has a president (elected every five years), a unicameral Territorial Council of nineteen members who are elected by popular vote and serve for five-year terms, and an executive council of seven members. Elections to these councils were first held on 1 July 2007 with the last election in March 2012.

A: What is COM short for?
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Q: Passage: Historically, there has been much dispute over whether such a thing as a vacuum can exist. Ancient Greek philosophers debated the existence of a vacuum, or void, in the context of atomism, which posited void and atom as the fundamental explanatory elements of physics. Following Plato, even the abstract concept of a featureless void faced considerable skepticism: it could not be apprehended by the senses, it could not, itself, provide additional explanatory power beyond the physical volume with which it was commensurate and, by definition, it was quite literally nothing at all, which cannot rightly be said to exist. Aristotle believed that no void could occur naturally, because the denser surrounding material continuum would immediately fill any incipient rarity that might give rise to a void.

A:
What did Greek philosophers believe could not occur naturally?
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