Input: Read this: Donald Wills Douglas, Sr. built a plant in 1922 at Clover Field (Santa Monica Airport) for the Douglas Aircraft Company. In 1924, four Douglas-built planes took off from Clover Field to attempt the first aerial circumnavigation of the world. Two planes made it back, after having covered 27,553 miles (44,342 km) in 175 days, and were greeted on their return September 23, 1924, by a crowd of 200,000 (generously estimated). The Douglas Company (later McDonnell Douglas) kept facilities in the city until the 1960s.
Question: How Many Planes returned from the circumnavigation in 1924?

Output: Two

Input: Read this: The heyday of mosaic making in Sicily was the age of the independent Norman kingdom in the 12th century. The Norman kings adopted the Byzantine tradition of mosaic decoration to enhance the somewhat dubious legality of their rule. Greek masters working in Sicily developed their own style, that shows the influence of Western European and Islamic artistic tendencies. Best examples of Sicilian mosaic art are the Cappella Palatina of Roger II, the Martorana church in Palermo and the cathedrals of Cefalu and Monreale.
Question: Why did the Normans adopt a Byzantine art style?

Output: enhance the somewhat dubious legality of their rule

Input: Read this: Carnival has been celebrated for centuries. The tradition was likely established under Venetian rule around the 16th century. It may have been influenced by Greek traditions, such as festivities for deities such as Dionysus. The celebration originally involved dressing in costumes and holding masked balls or visiting friends. In the twentieth century it became an organized event held during the 10 days preceding Lent (according to the Greek Orthodox calendar). The festival is celebrated almost exclusively in the city of Limassol.
Question: In what century did the Carnival become an organized event?

Output: twentieth

Input: Read this: The Great Plains come to an abrupt end at the Rocky Mountains. The Rocky Mountains form a large portion of the Western U.S., entering from Canada and stretching nearly to Mexico. The Rocky Mountain region is the highest region of the United States by average elevation. The Rocky Mountains generally contain fairly mild slopes and wider peaks compared to some of the other great mountain ranges, with a few exceptions (such as the Teton Mountains in Wyoming and the Sawatch Range in Colorado). The highest peaks of the Rockies are found in Colorado, the tallest peak being Mount Elbert at 14,440 ft (4,400 m). The Rocky Mountains contain some of the most spectacular, and well known scenery in the world. In addition, instead of being one generally continuous and solid mountain range, it is broken up into a number of smaller, intermittent mountain ranges, forming a large series of basins and valleys.
Question: Where did the Great Plains come to a gradual and at?

Output:
unanswerable