TASK DEFINITION: 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.
PROBLEM: Passage: The island experienced large-scale immigration over the 20th century, especially after the Second World War. Bermuda has a diverse population including both those with relatively deep roots in Bermuda extending back for centuries, and newer communities whose ancestry results from recent immigration, especially from Britain, North America, the West Indies, and the Portuguese Atlantic islands (especially the Azores), although these groups are steadily merging. About 46% of the population identified themselves with Bermudian ancestry in 2010, which was a decrease from the 51% who did so in the 2000 census. Those identifying with British ancestry dropped by 1% to 11% (although those born in Britain remain the largest non-native group at 3,942 persons). The number of people born in Canada declined by 13%. Those who reported West Indian ancestry were 13%. The number of people born in the West Indies actually increased by 538. A significant segment of the population is of Portuguese ancestry (10%), the result of immigration over the past 160 years, of whom 79% have residency status.

SOLUTION: During what century was the diverse immigration?

PROBLEM: Passage: Harvard's faculty includes scholars such as biologist E. O. Wilson, cognitive scientist Steven Pinker, physicists Lisa Randall and Roy Glauber, chemists Elias Corey, Dudley R. Herschbach and George M. Whitesides, computer scientists Michael O. Rabin and Leslie Valiant, Shakespeare scholar Stephen Greenblatt, writer Louis Menand, critic Helen Vendler, historians Henry Louis Gates, Jr. and Niall Ferguson, economists Amartya Sen, N. Gregory Mankiw, Robert Barro, Stephen A. Marglin, Don M. Wilson III and Martin Feldstein, political philosophers Harvey Mansfield, Baroness Shirley Williams and Michael Sandel, Fields Medalist mathematician Shing-Tung Yau, political scientists Robert Putnam, Joseph Nye, and Stanley Hoffmann, scholar/composers Robert Levin and Bernard Rands, astrophysicist Alyssa A. Goodman, and legal scholars Alan Dershowitz and Lawrence Lessig.

SOLUTION: What scientist published "The Better Angels of Our Nature" in 2011?

PROBLEM: Passage: This new-found importance of naval aviation forced nations to create a number of carriers, in efforts to provide air superiority cover for every major fleet in order to ward off enemy aircraft. This extensive usage required the construction of several new 'light' carriers. Escort aircraft carriers, such as USS Bogue, were sometimes purpose-built, but most were converted from merchant ships as a stop-gap measure to provide anti-submarine air support for convoys and amphibious invasions. Following this concept, light aircraft carriers built by the US, such as USS Independence, represented a larger, more "militarized" version of the escort carrier. Although with similar complement to Escort carriers, they had the advantage of speed from their converted cruiser hulls. The UK 1942 Design Light Fleet Carrier was designed for building quickly by civilian shipyards and with an expected service life of about 3 years. They served the Royal Navy during the war and was the hull design chosen for nearly all aircraft carrier equipped navies after the war until the 1980s. Emergencies also spurred the creation or conversion of highly unconventional aircraft carriers. CAM ships, were cargo-carrying merchant ships that could launch (but not retrieve) a single fighter aircraft from a catapult to defend the convoy from long range German aircraft.

SOLUTION:
What type of aircraft carrier was the USS Vogue?