Problem: Please answer a question about the following article about Slavs:
Cossacks, although Slavic-speaking and Orthodox Christians, came from a mix of ethnic backgrounds, including Tatars and other Turks. Many early members of the Terek Cossacks were Ossetians.
What religious affiliation did the Cossacks have?
A: Orthodox Christians

Question: Read this and answer the question

One wave of the population boom ended abruptly in the mid-1980s, as oil prices fell precipitously. The space industry also suffered in 1986 after the Space Shuttle Challenger disintegrated shortly after launch. There was a cutback in some activities for a period. In the late 1980s, the city's economy suffered from the nationwide recession. After the early 1990s recession, Houston made efforts to diversify its economy by focusing on aerospace and health care/biotechnology, and reduced its dependence on the petroleum industry. Since the increase of oil prices in the 2000s, the petroleum industry has again increased its share of the local economy.

Which shuttle disintegrated in 1986 to cause a decline in the space industry?
Answer: Space Shuttle Challenger

Problem: Traditionally, Shell was a heavily decentralised business worldwide (especially in the downstream) with companies in over 100 countries, each of which operated with a high degree of independence. The upstream tended to be far more centralised with much of the technical and financial direction coming from the central offices in The Hague. Nevertheless, there were very large "exploration and production" companies in a few major oil and gas production centres such as the United Kingdom (Shell Expro, a Joint Venture with Exxon), Nigeria, Brunei, and Oman.
What types of companies existed in a few major oil and gas production centers?
The answer is the following: "exploration and production"

The bells at the abbey were overhauled in 1971. The ring is now made up of ten bells, hung for change ringing, cast in 1971, by the Whitechapel Bell Foundry, tuned to the notes: F#, E, D, C#, B, A, G, F#, E and D. The Tenor bell in D (588.5 Hz) has a weight of 30 cwt, 1 qtr, 15 lb (3403 lb or 1544 kg).
Who cast the abbey bells?
Whitechapel Bell Foundry

Input: Detroit
Despite the city's recent financial issues, many developers remain unfazed by Detroit's problems. Midtown is one of the most successful areas within Detroit to have a residential occupancy rate of 96%. Numerous developments have been recently completely or are in various stages of construction. These include the $82 million reconstruction of downtown's David Whitney Building (now an Aloft Hotel and luxury residences), the Woodward Garden Block Development in Midtown, the residential conversion of the David Broderick Tower in downtown, the rehabilitation of the Book Cadillac Hotel (now a Westin and luxury condos) and Fort Shelby Hotel (now Doubletree) also in downtown, and various smaller projects.

Which building's reconstruction cost $82 million?
Output: David Whitney Building

Problem: Please answer a question about the following article about Arnold Schwarzenegger:
In 1968, Schwarzenegger and fellow bodybuilder Franco Columbu started a bricklaying business. The business flourished thanks to the pair's marketing savvy and an increased demand following the 1971 San Fernando earthquake. Schwarzenegger and Columbu used profits from their bricklaying venture to start a mail order business, selling bodybuilding and fitness-related equipment and instructional tapes.
With which of his friends did Schwarzenegger start a bricklaying company?
A:
Franco Columbu