Problem: Glacier:

A few glaciers have periods of very rapid advancement called surges. These glaciers exhibit normal movement until suddenly they accelerate, then return to their previous state. During these surges, the glacier may reach velocities far greater than normal speed. These surges may be caused by failure of the underlying bedrock, the pooling of meltwater at the base of the glacier perhaps delivered from a supraglacial lake or the simple accumulation of mass beyond a critical "tipping point". Temporary rates up to 90 m (300 ft) per day have occurred when increased temperature or overlying pressure caused bottom ice to melt and water to accumulate beneath a glacier.

What is the term for a gradual increase in a glaciers speed?
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A: unanswerable

Problem: Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic eon (the last 540 million years) marked a rapid growth in biodiversity via the Cambrian explosiona period during which the majority of multicellular phyla first appeared. The next 400 million years included repeated, massive biodiversity losses classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of plant and animal life. The PermianTriassic extinction event, 251 million years ago, was the worst; vertebrate recovery took 30 million years. The most recent, the CretaceousPaleogene extinction event, occurred 65 million years ago and has often attracted more attention than others because it resulted in the extinction of the dinosaurs.
How many mass extinctions have happened since Life began on Earth?
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Answer: five major mass extinctions

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Although the Jewish people in general were present across a wide geographical area as described, genetic research done by Gil Atzmon of the Longevity Genes Project at Albert Einstein College of Medicine suggests "that Ashkenazim branched off from other Jews around the time of the destruction of the First Temple, 2,500 years ago ... flourished during the Roman Empire but then went through a 'severe bottleneck' as they dispersed, reducing a population of several million to just 400 families who left Northern Italy around the year 1000 for Central and eventually Eastern Europe."
Researcher Gil Atzmon suggests that Ashkenazim branched off from other Jews around the time of what?
A: the destruction of the First Temple

Context and question: The government of the City of Miami (proper) uses the mayor-commissioner type of system. The city commission consists of five commissioners which are elected from single member districts. The city commission constitutes the governing body with powers to pass ordinances, adopt regulations, and exercise all powers conferred upon the city in the city charter. The mayor is elected at large and appoints a city manager. The City of Miami is governed by Mayor Tomas Regalado and 5 City commissioners which oversee the five districts in the City. The commission's regular meetings are held at Miami City Hall, which is located at 3500 Pan American Drive on Dinner Key in the neighborhood of Coconut Grove .
Who isn't the Mayor of Miami?
Answer: unanswerable

Question: Grapes are a type of fruit that grow in clusters of 15 to 300, and can be crimson, black, dark blue, yellow, green, orange, and pink. "White" grapes are actually green in color, and are evolutionarily derived from the purple grape. Mutations in two regulatory genes of white grapes turn off production of anthocyanins, which are responsible for the color of purple grapes. Anthocyanins and other pigment chemicals of the larger family of polyphenols in purple grapes are responsible for the varying shades of purple in red wines. Grapes are typically an ellipsoid shape resembling a prolate spheroid.
Is there an answer to this question: How many grapes are generally in a cluster?

Answer: 15 to 300

Problem: General Electric:

At about the same time, Charles Coffin, leading the Thomson-Houston Electric Company, acquired a number of competitors and gained access to their key patents. General Electric was formed through the 1892 merger of Edison General Electric Company of Schenectady, New York, and Thomson-Houston Electric Company of Lynn, Massachusetts, with the support of Drexel, Morgan & Co. Both plants continue to operate under the GE banner to this day. The company was incorporated in New York, with the Schenectady plant used as headquarters for many years thereafter. Around the same time, General Electric's Canadian counterpart, Canadian General Electric, was formed.

When was Drexel, Morgan & Co incorporated>
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A:
unanswerable