Article: Fryderyk's father, Nicolas Chopin, was a Frenchman from Lorraine who had emigrated to Poland in 1787 at the age of sixteen. Nicolas tutored children of the Polish aristocracy, and in 1806 married Justyna Krzyżanowska, a poor relative of the Skarbeks, one of the families for whom he worked. Fryderyk was baptized on Easter Sunday, 23 April 1810, in the same church where his parents had married, in Brochów. His eighteen-year-old godfather, for whom he was named, was Fryderyk Skarbek, a pupil of Nicolas Chopin. Fryderyk was the couple's second child and only son; he had an elder sister, Ludwika (1807–55), and two younger sisters, Izabela (1811–81) and Emilia (1812–27). Nicolas was devoted to his adopted homeland, and insisted on the use of the Polish language in the household.

Question: What is Chopin's older sister's name?
Ans: Ludwika


Article: Niels Bohr introduced the first quantized model of the atom in 1913, in an attempt to overcome a major shortcoming of Rutherford's classical model. In classical electrodynamics, a charge moving in a circle should radiate electromagnetic radiation. If that charge were to be an electron orbiting a nucleus, the radiation would cause it to lose energy and spiral down into the nucleus. Bohr solved this paradox with explicit reference to Planck's work: an electron in a Bohr atom could only have certain defined energies En

Question: When was the first quantized model of the atom introduced?
Ans: 1913


Article: Ann Arbor's "Tree Town" nickname stems from the dense forestation of its parks and residential areas. The city contains more than 50,000 trees along its streets and an equal number in parks. In recent years, the emerald ash borer has destroyed many of the city's approximately 10,500 ash trees. The city contains 157 municipal parks ranging from small neighborhood green spots to large recreation areas. Several large city parks and a university park border sections of the Huron River. Fuller Recreation Area, near the University Hospital complex, contains sports fields, pedestrian and bike paths, and swimming pools. The Nichols Arboretum, owned by the University of Michigan, is a 123-acre (50 ha) arboretum that contains hundreds of plant and tree species. It is on the city's east side, near the university's Central Campus. Located across the Huron River just beyond the university's North Campus is the university's Matthaei Botanical Gardens, which contains 300 acres of gardens and a large tropical conservatory.

Question: How many parks are there in the city of Ann Arbor?
Ans: 157


Article: While Blacks/African-Americans comprised only 13 percent of Michigan's population in 2010, they made up nearly 82 percent of Detroit's population. The next largest population groups were Whites, at 10 percent, and Hispanics, at 6 percent. According to the 2010 Census, segregation in Detroit has decreased in absolute and in relative terms. In the first decade of the 21st century, about two-thirds of the total black population in metropolitan area resided within the city limits of Detroit. The number of integrated neighborhoods has increased from 100 in 2000 to 204 in 2010. The city has also moved down the ranking, from number one most segregated to number four. A 2011 op-ed in The New York Times attributed the decreased segregation rating to the overall exodus from the city, cautioning that these areas may soon become more segregated. This pattern already happened in the 1970s, when apparent integration was actually a precursor to white flight and resegregation. Over a 60-year period, white flight occurred in the city. According to an estimate of the Michigan Metropolitan Information Center, from 2008 to 2009 the percentage of non-Hispanic White residents increased from 8.4% to 13.3%. Some empty nesters and many younger White people moved into the city while many African Americans moved to the suburbs.

Question: How much of Michigan's population is Black?
Ans:
13 percent