Please answer this: Extract the answer to the question from the following context. Question: Trains operate on what located on tracks built on the ground? Context: The Farmington Canal Trail is a rail trail that will eventually run continuously from downtown New Haven to Northampton, Massachusetts. The scenic trail follows the path of the historic New Haven and Northampton Company and the Farmington Canal. Currently, there is a continuous 14-mile (23 km) stretch of the trail from downtown, through Hamden and into Cheshire, making bicycle commuting between New Haven and those suburbs possible. The trail is part of the East Coast Greenway, a proposed 3,000-mile (4,800 km) bike path that would link every major city on the East Coast from Florida to Maine.
++++++++
Answer: rail

Problem: Extract the answer to the question from the following context. Question: Who praised Lee, literary circles or her editors? Context: Despite her editors' warnings that the book might not sell well, it quickly became a sensation, bringing acclaim to Lee in literary circles, in her hometown of Monroeville, and throughout Alabama. The book went through numerous subsequent printings and became widely available through its inclusion in the Book of the Month Club and editions released by Reader's Digest Condensed Books.

A: literary circles

Problem: Given the question: Extract the answer to the question from the following context. Question: what sense  do the eyes have Context: The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. Only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain; diffuse or localised nerve nets are present instead. The brain is located in the head, usually close to the primary sensory organs for such senses as vision, hearing, balance, taste, and smell. The brain is the most complex organ in a vertebrate's body. In a typical human, the cerebral cortex (the largest part) is estimated to contain 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.
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The answer is:
vision

input question: Extract the answer to the question from the following context. Question: What is farthest west, Paris, Brussels or Rouen? Context: Paris is located in northern central France. By road it is 450 kilometres (280 mi) south-east of London, 287 kilometres (178 mi) south of Calais, 305 kilometres (190 mi) south-west of Brussels, 774 kilometres (481 mi) north of Marseille, 385 kilometres (239 mi) north-east of Nantes, and 135 kilometres (84 mi) south-east of Rouen. Paris is located in the north-bending arc of the river Seine and includes two islands, the Île Saint-Louis and the larger Île de la Cité, which form the oldest part of the city. The river's mouth on the English Channel (La Manche) is about 233 mi (375 km) downstream of the city, established around 7600 BC. The city is spread widely on both banks of the river. Overall, the city is relatively flat, and the lowest point is 35 m (115 ft) above sea level. Paris has several prominent hills, the highest of which is Montmartre at 130 m (427 ft). Montmartre gained its name from the martyrdom of Saint Denis, first bishop of Paris, atop the Mons Martyrum, "Martyr's mound", in 250.???
output answer: Rouen

Extract the answer to the question from the following context. Question: Which document needed to be implemented for the six self-governing colonies of Britain to form into one nation? Context: In 1901, the Federation of Australia was the process by which the six separate British self-governing colonies of New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia formed one nation. They kept the systems of government that they had developed as separate colonies but also would have a federal government that was responsible for matters concerning the whole nation. When the Constitution of Australia came into force, the colonies collectively became states of the Commonwealth of Australia.
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Answer: Constitution

Q: Extract the answer to the question from the following context. Question: What was the worst thing about the French model? Context: In addition, the Prussian military education system was superior to the French model; Prussian staff officers were trained to exhibit initiative and independent thinking. Indeed, this was Moltke's expectation. The French, meanwhile, suffered from an education and promotion system that stifled intellectual development. According to the military historian Dallas Irvine, the system "was almost completely effective in excluding the army's brain power from the staff and high command. To the resulting lack of intelligence at the top can be ascribed all the inexcusable defects of French military policy."
A:
inexcusable defects