Input: Read this: As of 2011, 235330 million people worldwide are affected by asthma, and approximately 250,000345,000 people die per year from the disease. Rates vary between countries with prevalences between 1 and 18%. It is more common in developed than developing countries. One thus sees lower rates in Asia, Eastern Europe and Africa. Within developed countries it is more common in those who are economically disadvantaged while in contrast in developing countries it is more common in the affluent. The reason for these differences is not well known. Low and middle income countries make up more than 80% of the mortality.
Question: How many people were affected by asthma in Asia as of 2011?

Output: unanswerable

Input: Read this: Starting as a fishing outpost for European fishermen, St. John's consisted mostly of the homes of fishermen, sheds, storage shacks, and wharves constructed out of wood. Like many other cities of the time, as the Industrial Revolution took hold and new methods and materials for construction were introduced, the landscape changed as the city grew in width and height. The Great Fire of 1892 destroyed most of the downtown core, and most residential and other wood-frame buildings date from this period.
Question: What type of buildings date to the Industrial revolution?

Output: unanswerable

Input: Read this: Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century. Italy was the major user, for lines in the mountainous regions of northern Italy from 1901 until 1976. The first lines were the Burgdorf-Thun line in Switzerland (1899), and the lines of the Ferrovia Alta Valtellina from Colico to Chiavenna and Tirano in Italy, which were electrified in 1901 and 1902. Other lines where the three-phase system were used were the Simplon Tunnel in Switzerland from 1906 to 1930, and the Cascade Tunnel of the Great Northern Railway in the United States from 1909 to 1927.
Question: Where did Italy start using the AC system?

Output: in the mountainous regions of northern Italy

Input: Read this: The rhythm is linked to the lightdark cycle. Animals, including humans, kept in total darkness for extended periods eventually function with a free-running rhythm. Their sleep cycle is pushed back or forward each "day", depending on whether their "day", their endogenous period, is shorter or longer than 24 hours. The environmental cues that reset the rhythms each day are called zeitgebers (from the German, "time-givers"). Totally blind subterranean mammals (e.g., blind mole rat Spalax sp.) are able to maintain their endogenous clocks in the apparent absence of external stimuli. Although they lack image-forming eyes, their photoreceptors (which detect light) are still functional; they do surface periodically as well.[page needed]
Question: What do blind mole rats have in place of vision?

Output:
photoreceptors