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: Uranium carbides and uranium nitrides are both relatively inert semimetallic compounds that are minimally soluble in acids, react with water, and can ignite in air to form U
3O
8. Carbides of uranium include uranium monocarbide (UC), uranium dicarbide (UC
2), and diuranium tricarbide (U
2C
3). Both UC and UC
2 are formed by adding carbon to molten uranium or by exposing the metal to carbon monoxide at high temperatures. Stable below 1800 °C, U
2C
3 is prepared by subjecting a heated mixture of UC and UC
2 to mechanical stress. Uranium nitrides obtained by direct exposure of the metal to nitrogen include uranium mononitride (UN), uranium dinitride (UN
2), and diuranium trinitride (U
2N
3).

Output: Along with uranium monocarbide and uranium dicarbide, what is a unnotable carbide of uranium?


Input: Consider Input: Passage: Exchanging "+" and "−" in the expression, i.e. permuting the two solutions of the equation can be viewed as a (very simple) group operation. Similar formulae are known for cubic and quartic equations, but do not exist in general for degree 5 and higher. Abstract properties of Galois groups associated with polynomials (in particular their solvability) give a criterion for polynomials that have all their solutions expressible by radicals, i.e. solutions expressible using solely addition, multiplication, and roots similar to the formula above.

Output: What degree must it be lower than to have simple formulas?


Input: Consider Input: Passage: Raleigh is home to numerous cultural, educational, and historic sites. The Duke Energy Center for the Performing Arts in Downtown Raleigh features three theater venues and serves as the home for the North Carolina Symphony and the Carolina Ballet. Walnut Creek Amphitheatre is a large music amphitheater located in Southeast Raleigh. Museums in Raleigh include the North Carolina Museum of Art in West Raleigh, as well as the North Carolina Museum of History and North Carolina Museum of Natural Sciences located next to each other near the State Capitol in Downtown Raleigh. Several major universities and colleges call Raleigh home, including North Carolina State University, the largest public university in the state, and Shaw University, the first historically black university in the American South and site of the foundation of the Student Nonviolent Coordinating Committee, an important civil rights organization of the 1960s. One U.S. president, Andrew Johnson, was born in Raleigh.


Output: What energy center is on the outskirts of town?