Input: Read this: Yale's residential college system was established in 1933 by Edward S. Harkness, who admired the social intimacy of Oxford and Cambridge and donated significant funds to found similar colleges at Yale and Harvard. Though Yale's colleges resemble their English precursors organizationally and architecturally, they are dependent entities of Yale College and have limited autonomy. The colleges are led by a master and an academic dean, who reside in the college, and university faculty and affiliates comprise each college's fellowship. Colleges offer their own seminars, social events, and speaking engagements known as "Master's Teas," but do not contain programs of study or academic departments. Instead, all undergraduate courses are taught by the Faculty of Arts and Sciences and are open to members of any college.
Question: Who established Yale's residential college system?

Output: Edward S. Harkness


Input: Read this: The Scheinergrade (Sch.) system was devised by the German astronomer Julius Scheiner (1858–1913) in 1894 originally as a method of comparing the speeds of plates used for astronomical photography. Scheiner's system rated the speed of a plate by the least exposure to produce a visible darkening upon development. Speed was expressed in degrees Scheiner, originally ranging from 1° Sch. to 20° Sch., where an increment of 19° Sch. corresponded to a hundredfold increase in sensitivity, which meant that an increment of 3° Sch. came close to a doubling of sensitivity.
Question: Approximately how many degrees indicate double the sensitivity? 

Output: an increment of 3° Sch


Input: Read this: During the Three Kingdoms period of ancient China, there was constant warfare occurring in the Central Plain of China. Northerners began to enter into Fujian region, causing the region to incorporate parts of northern Chinese dialects. However, the massive migration of northern Han Chinese into Fujian region mainly occurred after the Disaster of Yongjia. The Jìn court fled from the north to the south, causing large numbers of northern Han Chinese to move into Fujian region. They brought the old Chinese — spoken in Central Plain of China from prehistoric era to 3rd century — into Fujian. This then gradually evolved into the Quanzhou dialect.
Question: What was the name of the period of costant warfare across Asia?

Output: unanswerable


Input: Read this: Many pubs were drinking establishments, and little emphasis was placed on the serving of food, other than sandwiches and "bar snacks", such as pork scratchings, pickled eggs, salted crisps and peanuts which helped to increase beer sales. In South East England (especially London) it was common until recent times for vendors selling cockles, whelks, mussels, and other shellfish to sell to customers during the evening and at closing time. Many mobile shellfish stalls would set up near pubs, a practice that continues in London's East End. Otherwise, pickled cockles and mussels may be offered by the pub in jars or packets.
Question: In what section of London can mobile shellfish stalls still be found today?

Output:
East End