Problem: Karl Popper:

The Quine-Duhem thesis argues that it's impossible to test a single hypothesis on its own, since each one comes as part of an environment of theories. Thus we can only say that the whole package of relevant theories has been collectively falsified, but cannot conclusively say which element of the package must be replaced. An example of this is given by the discovery of the planet Neptune: when the motion of Uranus was found not to match the predictions of Newton's laws, the theory "There are seven planets in the solar system" was rejected, and not Newton's laws themselves. Popper discussed this critique of naive falsificationism in Chapters 3 and 4 of The Logic of Scientific Discovery. For Popper, theories are accepted or rejected via a sort of selection process. Theories that say more about the way things appear are to be preferred over those that do not; the more generally applicable a theory is, the greater its value. Thus Newton's laws, with their wide general application, are to be preferred over the much more specific "the solar system has seven planets".[dubious discuss]

When was the theory that there are eight planets in the solar system rejected?
---
A: unanswerable

Problem: Some of the leading art groups of China are based in Nanjing; they include the Qianxian Dance Company, Nanjing Dance Company, Jiangsu Peking Opera Institute and Nanjing Xiaohonghua Art Company among others.
What art company is based in Nanjing?
---
Answer: Nanjing Xiaohonghua Art Company

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In addition to the Jazz Festival (described above), New Haven serves as the home city of the annual International Festival of Arts and Ideas. New Haven's Saint Patrick's Day parade, which began in 1842, is New England's oldest St. Patty's Day parade and draws the largest crowds of any one-day spectator event in Connecticut. The St. Andrew the Apostle Italian Festival has taken place in the historic Wooster Square neighborhood every year since 1900. Other parishes in the city celebrate the Feast of Saint Anthony of Padua and a carnival in honor of St. Bernadette Soubirous. New Haven celebrates Powder House Day every April on the New Haven Green to commemorate the city's entrance into the Revolutionary War. The annual Wooster Square Cherry Blossom Festival commemorates the 1973 planting of 72 Yoshino Japanese Cherry Blossom trees by the New Haven Historic Commission in collaboration with the New Haven Parks Department and residents of the neighborhood. The Festival now draws well over 5,000 visitors. The Film Fest New Haven has been held annually since 1995.
What organization was responsible for the planting of several cherry blossom trees in 1973?
A: New Haven Historic Commission

Context and question: Of great importance are the many species of salamanders and, in particular, the lungless species (Family Plethodontidae) that live in great abundance concealed by leaves and debris, on the forest floor. Most frequently seen, however, is the eastern or red-spotted newt (Notophthalmus viridescens), whose terrestrial eft form is often encountered on the open, dry forest floor. It has been estimated that salamanders represent the largest class of animal biomass in the Appalachian forests. Frogs and toads are of lesser diversity and abundance, but the wood frog (Rana sylvatica) is, like the eft, commonly encountered on the dry forest floor, while a number of species of small frogs, such as spring peepers (Pseudacris crucifer), enliven the forest with their calls. Salamanders and other amphibians contribute greatly to nutrient cycling through their consumption of small life forms on the forest floor and in aquatic habitats.
What are the frogs and toads the largest class of?
Answer: unanswerable

Question: When the Dzungar Mongols attempted to spread their territory from what is now Xinjiang into Tibet, the Kangxi Emperor (r. 16611722) responded to Tibetan pleas for aid with his own expedition to Tibet, occupying Lhasa in 1720. By 1751, during the reign of the Qianlong Emperor (r. 17351796), a protectorate and permanent Qing dynasty garrison was established in Tibet. As of 1751, Albert Kolb writes that "Chinese claims to suzerainty over Tibet date from this time."
Is there an answer to this question: When did the Kangxi Emperor occupy Lhasa?

Answer: 1720

QUES: Despite the city's recent financial issues, many developers remain unfazed by Detroit's problems. Midtown is one of the most successful areas within Detroit to have a residential occupancy rate of 96%. Numerous developments have been recently completely or are in various stages of construction. These include the $82 million reconstruction of downtown's David Whitney Building (now an Aloft Hotel and luxury residences), the Woodward Garden Block Development in Midtown, the residential conversion of the David Broderick Tower in downtown, the rehabilitation of the Book Cadillac Hotel (now a Westin and luxury condos) and Fort Shelby Hotel (now Doubletree) also in downtown, and various smaller projects.

Which Downtown tower was converted to residential use?
What is the answer?
ANS:
David Broderick Tower