Problem: Please answer a question about the following article about Frédéric Chopin:
All of Chopin's compositions include the piano. Most are for solo piano, though he also wrote two piano concertos, a few chamber pieces, and some songs to Polish lyrics. His keyboard style is highly individual and often technically demanding; his own performances were noted for their nuance and sensitivity. Chopin invented the concept of instrumental ballade. His major piano works also include mazurkas, waltzes, nocturnes, polonaises, études, impromptus, scherzos, preludes and sonatas, some published only after his death. Influences on his compositional style include Polish folk music, the classical tradition of J. S. Bach, Mozart and Schubert, the music of all of whom he admired, as well as the Paris salons where he was a frequent guest. His innovations in style, musical form, and harmony, and his association of music with nationalism, were influential throughout and after the late Romantic period.
What concept was Frédéric credited with creating?
A: instrumental ballade


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The book was written for non-specialist readers and attracted widespread interest upon its publication. As Darwin was an eminent scientist, his findings were taken seriously and the evidence he presented generated scientific, philosophical, and religious discussion. The debate over the book contributed to the campaign by T. H. Huxley and his fellow members of the X Club to secularise science by promoting scientific naturalism. Within two decades there was widespread scientific agreement that evolution, with a branching pattern of common descent, had occurred, but scientists were slow to give natural selection the significance that Darwin thought appropriate. During "the eclipse of Darwinism" from the 1880s to the 1930s, various other mechanisms of evolution were given more credit. With the development of the modern evolutionary synthesis in the 1930s and 1940s, Darwin's concept of evolutionary adaptation through natural selection became central to modern evolutionary theory, and it has now become the unifying concept of the life sciences.

What section of the population was Darwin's book written for?
Answer: non-specialist readers


Problem: Brain tissue consumes a large amount of energy in proportion to its volume, so large brains place severe metabolic demands on animals. The need to limit body weight in order, for example, to fly, has apparently led to selection for a reduction of brain size in some species, such as bats. Most of the brain's energy consumption goes into sustaining the electric charge (membrane potential) of neurons. Most vertebrate species devote between 2% and 8% of basal metabolism to the brain. In primates, however, the percentage is much higher—in humans it rises to 20–25%. The energy consumption of the brain does not vary greatly over time, but active regions of the cerebral cortex consume somewhat more energy than inactive regions; this forms the basis for the functional brain imaging methods PET, fMRI, and NIRS. The brain typically gets most of its energy from oxygen-dependent metabolism of glucose (i.e., blood sugar), but ketones provide a major alternative source, together with contributions from medium chain fatty acids (caprylic and heptanoic acids), lactate, acetate, and possibly amino acids.
The energy used for metabolism of the brain in humans is what percentage?
The answer is the following: 20–25%


There are fifteen seats in the Legislative Council of Saint Helena, a unicameral legislature, in addition to a Speaker and a Deputy Speaker. Twelve of the fifteen members are elected in elections held every four years. The three ex officio members are the Chief Secretary, Financial Secretary and Attorney General. The Executive Council is presided over by the Governor, and consists of three ex officio officers and five elected members of the Legislative Council appointed by the Governor. There is no elected Chief Minister, and the Governor acts as the head of government. In January 2013 it was proposed that the Executive Council would be led by a "Chief Councillor" who would be elected by the members of the Legislative Council and would nominate the other members of the Executive Council. These proposals were put to a referendum on 23 March 2013 where they were defeated by 158 votes to 42 on a 10% turnout.
When were proposals for a Chief Councillor put on hold?
23 March 2013


Input: Valencia
In the 15th century the dome was added and the naves extended back of the choir, uniting the building to the tower and forming a main entrance. Archbishop Luis Alfonso de los Cameros began the building of the main chapel in 1674; the walls were decorated with marbles and bronzes in the Baroque style of that period. At the beginning of the 18th century the German Conrad Rudolphus built the façade of the main entrance. The other two doors lead into the transept; one, that of the Apostles in pure pointed Gothic, dates from the 14th century, the other is that of the Paláu. The additions made to the back of the cathedral detract from its height. The 18th-century restoration rounded the pointed arches, covered the Gothic columns with Corinthian pillars, and redecorated the walls. The dome has no lantern, its plain ceiling being pierced by two large side windows. There are four chapels on either side, besides that at the end and those that open into the choir, the transept, and the sanctuary. It contains many paintings by eminent artists. A silver reredos, which was behind the altar, was carried away in the war of 1808, and converted into coin to meet the expenses of the campaign. There are two paintings by Francisco Goya in the San Francesco chapel. Behind the Chapel of the Blessed Sacrament is a small Renaissance chapel built by Calixtus III. Beside the cathedral is the chapel dedicated to the Our Lady of the Forsaken (Virgen de los desamparados or Mare de Déu dels Desamparats).

When was the main entrance constructed?
Output: beginning of the 18th century


Problem: Please answer a question about the following article about London:
London's bus network is one of the largest in the world, running 24 hours a day, with about 8,500 buses, more than 700 bus routes and around 19,500 bus stops. In 2013, the network had more than 2 billion commuter trips per annum, more than the Underground. Around £850 million is taken in revenue each year. London has the largest wheelchair accessible network in the world and, from the 3rd quarter of 2007, became more accessible to hearing and visually impaired passengers as audio-visual announcements were introduced. The distinctive red double-decker buses are an internationally recognised trademark of London transport along with black cabs and the Tube.
How much revenue is generated yearly by London's public bus service?
A:
£850 million