Problem: Extract the answer to the question from the following context. Question: Friedman taught from his body of work in his advanced classes? Context: Hayek is widely recognised for having introduced the time dimension to the equilibrium construction and for his key role in helping inspire the fields of growth theory, information economics, and the theory of spontaneous order. The "informal" economics presented in Milton Friedman's massively influential popular work Free to Choose (1980), is explicitly Hayekian in its account of the price system as a system for transmitting and co-ordinating knowledge. This can be explained by the fact that Friedman taught Hayek's famous paper "The Use of Knowledge in Society" (1945) in his graduate seminars.

A: Hayek

Problem: Extract the answer to the question from the following context. Question: what kind of vehicle does the transit system use? Context: The Delhi Metro is a rapid transit system serving New Delhi, Delhi, Gurgaon, Faridabad, Noida, and Ghaziabad in the National Capital Region of India. Delhi Metro is the world's 12th largest metro system in terms of length. Delhi Metro was India's first modern public transportation system, which had revolutionised travel by providing a fast, reliable, safe, and comfortable means of transport. The network consists of six lines with a total length of 189.63 kilometres (117.83 miles) with 142 stations, of which 35 are underground, five are at-grade, and the remainder are elevated. All stations have escalators, elevators, and tactile tiles to guide the visually impaired from station entrances to trains. It has a combination of elevated, at-grade, and underground lines, and uses both broad gauge and standard gauge rolling stock. Four types of rolling stock are used: Mitsubishi-ROTEM Broad gauge, Bombardier MOVIA, Mitsubishi-ROTEM Standard gauge, and CAF Beasain Standard gauge.

A: trains

Problem: Extract the answer to the question from the following context. Question: How did the grand houses differ? Context: Versions of revived Palladian architecture dominated English country house architecture. Houses were increasingly placed in grand landscaped settings, and large houses were generally made wide and relatively shallow, largely to look more impressive from a distance. The height was usually highest in the centre, and the Baroque emphasis on corner pavilions often found on the continent generally avoided. In grand houses, an entrance hall led to steps up to a piano nobile or mezzanine floor where the main reception rooms were. Typically the basement area or "rustic", with kitchens, offices and service areas, as well as male guests with muddy boots, came some way above ground, and was lit by windows that were high on the inside, but just above ground level outside. A single block was typical, with a perhaps a small court for carriages at the front marked off by railings and a gate, but rarely a stone gatehouse, or side wings around the court.

A: were generally made wide and relatively shallow, largely to look more impressive from a distance

Problem: Extract the answer to the question from the following context. Question: Who had a different background than the rest of the people at Roc-A-Fella Records? Context: According to Capitol Record's A&R, Joe Weinberger, he was approached by West and almost signed a deal with him, but another person in the company convinced Capitol's president not to. Desperate to keep West from defecting to another label, then-label head Damon Dash reluctantly signed West to Roc-A-Fella Records. Jay-Z later admitted that Roc-A-Fella was initially reluctant to support West as a rapper, claiming that many saw him as a producer first and foremost, and that his background contrasted with that of his labelmates.

A:
West