Problem: Washington University in St. Louis:

Washington University has a large number of student-run musical groups on campus, including 12 official a cappella groups. The Pikers, an all-male group, is the oldest such group on campus. The Greenleafs, an all-female group is the oldest (and only) female group on campus. The Mosaic Whispers, founded in 1991, is the oldest co-ed group on campus. They have produced 9 albums and have appeared on a number of compilation albums, including Ben Folds' Ben Folds Presents: University A Cappella! The Amateurs, who also appeared on this album, is another co-ed a cappella group on campus, founded in 1991. They have recorded seven albums and toured extensively. After Dark is a co-ed a cappella group founded in 2001. It has released three albums and has won several Contemporary A Capella Recording (CARA) awards. In 2008 the group performed on MSNBC during coverage of the vice presidential debate with specially written songs about Joe Biden and Sarah Palin. The Ghost Lights, founded in 2010, is the campus's newest and only Broadway, Movies, and Television soundtrack group. They have performed multiple philanthropic concerts in the greater St. Louis area and were honored in November 2010 with the opportunity to perform for Nobel Laureate Douglass North at his birthday celebration.

How many member are there in The Pikers a cappella group?
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A: unanswerable

Problem: Tajikistan:

Tajikistan's economy grew substantially after the war. The GDP of Tajikistan expanded at an average rate of 9.6% over the period of 20002007 according to the World Bank data. This improved Tajikistan's position among other Central Asian countries (namely Turkmenistan and Uzbekistan), which seem to have degraded economically ever since. The primary sources of income in Tajikistan are aluminium production, cotton growing and remittances from migrant workers. Cotton accounts for 60% of agricultural output, supporting 75% of the rural population, and using 45% of irrigated arable land. The aluminium industry is represented by the state-owned Tajik Aluminum Company the biggest aluminium plant in Central Asia and one of the biggest in the world.

What is the name of the state owned company that produces aluminium?
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A: Tajik Aluminum Company

Problem: Tuberculosis:

The M. tuberculosis complex (MTBC) includes four other TB-causing mycobacteria: M. bovis, M. africanum, M. canetti, and M. microti. M. africanum is not widespread, but it is a significant cause of tuberculosis in parts of Africa. M. bovis was once a common cause of tuberculosis, but the introduction of pasteurized milk has almost completely eliminated this as a public health problem in developed countries. M. canetti is rare and seems to be limited to the Horn of Africa, although a few cases have been seen in African emigrants. M. microti is also rare and is seen almost only in immunodeficient people, although its prevalence may be significantly underestimated.

Which one of the tuberculosis mycobacteria is associated with the Horn of Africa?
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A: M. canetti

Problem: List of numbered streets in Manhattan:

Heading east, 27th Street passes through Chelsea Park between Tenth and Ninth Avenues, with the Fashion Institute of Technology (FIT) on the corner of Eighth. On Madison Avenue between 26th and 27th streets, on the site of the old Madison Square Garden, is the New York Life Building, built in 1928 and designed by Cass Gilbert, with a square tower topped by a striking gilded pyramid. Twenty-Seventh Street passes one block north of Madison Square Park and culminates at Bellevue Hospital Center on First Avenue.

What year was the New York Life Building built?
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A:
1928