[Q]: Extract the answer to the question from the following context. Question: What does piano have? Context: The theories surrounding equal temperament began to be put in wider practice, especially as it enabled a wider range of chromatic possibilities in hard-to-tune keyboard instruments. Although Bach did not use equal temperament, as a modern piano is generally tuned, changes in the temperaments from the meantone system, common at the time, to various temperaments that made modulation between all keys musically acceptable, made possible Bach's Well-Tempered Clavier.
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[A]: keyboard

[Q]: Extract the answer to the question from the following context. Question: what place was mentioned first? Context: In the Early Middle Ages, from the end of the 4th century, the western extent of modern-day Switzerland was part of the territory of the Kings of the Burgundians. The Alemanni settled the Swiss plateau in the 5th century and the valleys of the Alps in the 8th century, forming Alemannia. Modern-day Switzerland was therefore then divided between the kingdoms of Alemannia and Burgundy. The entire region became part of the expanding Frankish Empire in the 6th century, following Clovis I's victory over the Alemanni at Tolbiac in 504 AD, and later Frankish domination of the Burgundians.
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[A]: Switzerland

[Q]: Extract the answer to the question from the following context. Question: Who did Espartero support in the clashes between the liberals and republicans? Context: During the regency of Maria Cristina, Espartero ruled Spain for two years as its 18th Prime Minister from 16 September 1840 to 21 May 1841. Under his progressive government the old regime was tenuously reconciled to his liberal policies. During this period of upheaval in the provinces he declared that all the estates of the Church, its congregations, and its religious orders were national propertythough in Valencia, most of this property was subsequently acquired by the local bourgeoisie. City life in Valencia carried on in a revolutionary climate, with frequent clashes between liberals and republicans, and the constant threat of reprisals by the Carlist troops of General Cabrera.
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[A]: liberals

[Q]: Extract the answer to the question from the following context. Question: The ski jump ramp only works for big carriers? Context: Another deck structure that can be seen is a ski-jump ramp at the forward end of the flight deck. This was first developed to help launch STOVL aircraft take off at far higher weights than is possible with a vertical or rolling takeoff on flat decks. Originally developed by the Royal Navy, it since has been adopted by many navies for smaller carriers. A ski-jump ramp works by converting some of the forward rolling movement of the aircraft into vertical velocity and is sometimes combined with the aiming of jet thrust partly downwards. This allows heavily loaded and fueled aircraft a few more precious seconds to attain sufficient air velocity and lift to sustain normal flight. Without a ski-jump launching fully loaded and fueled aircraft such as the Harrier would not be possible on a smaller flat deck ship before either stalling out or crashing directly into the sea.
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[A]:
adopted by many navies for smaller carriers