Problem: Given the question: Extract the answer to the question from the following context. Question: Which one is softer, brass or copper? Context: The major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small part of copper supply is used in production of compounds for nutritional supplements and fungicides in agriculture. Machining of copper is possible, although it is usually necessary to use an alloy for intricate parts to get good machinability characteristics.
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The answer is:
Copper

Problem: Given the question: Extract the answer to the question from the following context. Question: what musical act is mentioned third to last? Context: The city also has several smaller music venues, including the Brook, The Talking Heads, The Soul Cellar, The Joiners and Turner Sims, as well as smaller "club circuit" venues like Hampton's and Lennon's, and a number of public houses including the Platform tavern, the Dolphin, the Blue Keys and many others. The Joiners has played host to such acts as Oasis, Radiohead, Green Day, Suede, PJ Harvey, the Manic Street Preachers, Coldplay, the Verve, the Libertines and Franz Ferdinand, while Hampton's and Lennon's have hosted early appearances by Kate Nash, Scouting for Girls and Band of Skulls. The nightclub, Junk, has been nominated for the UK's best small nightclub, and plays host to a range of dance music's top acts.
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The answer is:
Kate Nash

Problem: Given the question: Extract the answer to the question from the following context. Question: What would you find in a building with 4 stories? Context: Passenger elevators capacity is related to the available floor space. Generally passenger elevators are available in capacities from 500 to 2,700 kg (1,0006,000 lb) in 230 kg (500 lb) increments.[citation needed] Generally passenger elevators in buildings of eight floors or fewer are hydraulic or electric, which can reach speeds up to 1 m/s (200 ft/min) hydraulic and up to 152 m/min (500 ft/min) electric. In buildings up to ten floors, electric and gearless elevators are likely to have speeds up to 3 m/s (500 ft/min), and above ten floors speeds range 3 to 10 m/s (5002,000 ft/min).[citation needed]
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The answer is:
elevators in buildings of eight floors or fewer are hydraulic or electric, which can reach speeds up to 1 m/s