Problem: Detroit:

Since 2006, $9 billion has been invested in downtown and surrounding neighborhoods; $5.2 billion of that in has come in 2013 and 2014. Construction activity, particularly rehabilitation of historic downtown buildings, has increased markedly. The number of vacant downtown buildings has dropped from nearly 50 to around 13.[when?] Among the most notable redevelopment projects are the Book Cadillac Hotel and the Fort Shelby Hotel; the David Broderick Tower; and the David Whitney Building. Meanwhile, work is underway or set to begin on the historic, vacant Wurlitzer Building and Strathmore Hotel.[citation needed]

How much money has been invested in Detroit in 2013-2014?
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A: $5.2 billion


Problem: Except for a few primitive organisms such as sponges (which have no nervous system) and cnidarians (which have a nervous system consisting of a diffuse nerve net), all living multicellular animals are bilaterians, meaning animals with a bilaterally symmetric body shape (that is, left and right sides that are approximate mirror images of each other). All bilaterians are thought to have descended from a common ancestor that appeared early in the Cambrian period, 485-540 million years ago, and it has been hypothesized that this common ancestor had the shape of a simple tubeworm with a segmented body. At a schematic level, that basic worm-shape continues to be reflected in the body and nervous system architecture of all modern bilaterians, including vertebrates. The fundamental bilateral body form is a tube with a hollow gut cavity running from the mouth to the anus, and a nerve cord with an enlargement (a ganglion) for each body segment, with an especially large ganglion at the front, called the brain. The brain is small and simple in some species, such as nematode worms; in other species, including vertebrates, it is the most complex organ in the body. Some types of worms, such as leeches, also have an enlarged ganglion at the back end of the nerve cord, known as a "tail brain".
Creatures that have a diffuse nerve net are called what?
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Answer: cnidarians


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Canadian football is also played at the high school, junior, collegiate, and semi-professional levels: the Canadian Junior Football League, formed May 8, 1974, and Quebec Junior Football League are leagues for players aged 18–22, many post-secondary institutions compete in Canadian Interuniversity Sport for the Vanier Cup, and senior leagues such as the Alberta Football League have grown in popularity in recent years. Great achievements in Canadian football are enshrined in the Canadian Football Hall of Fame.
What institution memorializes great Canadian football achievements?
A: Canadian Football Hall of Fame


Context and question: In military affairs, the use of infantry with specialised roles increased. Along with the still-dominant heavy cavalry, armies often included mounted and infantry crossbowmen, as well as sappers and engineers. Crossbows, which had been known in Late Antiquity, increased in use partly because of the increase in siege warfare in the 10th and 11th centuries.[AB] The increasing use of crossbows during the 12th and 13th centuries led to the use of closed-face helmets, heavy body armour, as well as horse armour. Gunpowder was known in Europe by the mid-13th century with a recorded use in European warfare by the English against the Scots in 1304, although it was merely used as an explosive and not as a weapon. Cannon were being used for sieges in the 1320s, and hand-held guns were in use by the 1360s.
In what century did Europeans become aware of gunpowder?
Answer: 13th


Question: A local pioneer of folk song collection in the first half of the 19th century was Shakespearean scholar James Orchard Halliwell, but it was not until the second folk revival in the 20th century that the full range of song from the county, including industrial folk song, began to gain attention. The county produced one of the major figures of the revival in Ewan MacColl, but also a local champion in Harry Boardman, who from 1965 onwards probably did more than anyone to popularise and record the folk song of the county. Perhaps the most influential folk artists to emerge from the region in the late 20th century were Liverpool folk group The Spinners, and from Manchester folk troubadour Roy Harper and musician, comedian and broadcaster Mike Harding. The region is home to numerous folk clubs, many of them catering to Irish and Scottish folk music. Regular folk festivals include the Fylde Folk Festival at Fleetwood.
Is there an answer to this question: In what year was James Orchard Halliwell born?

Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Hunter-gatherers tend to have an egalitarian social ethos, although settled hunter-gatherers (for example, those inhabiting the Northwest Coast of North America) are an exception to this rule. Nearly all African hunter-gatherers are egalitarian, with women roughly as influential and powerful as men.
In American culture, women are roughly what?
A:
unanswerable