Text: A hex key, Allen key or Allen wrench is a tool used to drive bolts and screws with hexagonal sockets in their heads.

Question: is a hex key the same as an allen wrench?
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Answer: yes

Text: After becoming the predominant defensive alignment in the late 1970s-early 1980s, the 3--4 defense declined in popularity over the next two decades, but experienced a resurgence in the 2000s among both professional and college football teams. As of 2017, NFL teams that regularly incorporate the 3--4 defensive alignment scheme as a base include the Green Bay Packers, Oakland Raiders, Los Angeles Rams, Pittsburgh Steelers, Baltimore Ravens, Arizona Cardinals, Indianapolis Colts, Kansas City Chiefs, New York Jets, Washington Redskins, Denver Broncos, Tennessee Titans, Houston Texans, and the Chicago Bears, who used the 3--4 as their base defense for the first time in 2015.

Question: do the texans run a 3-4 defense?
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Answer: yes

Text: Brown bears are found in Asia, Europe, and North America, giving them the widest ranges of bear species. They also inhabited North Africa and the Middle East. In North America, grizzly bears previously ranged from Alaska down to Mexico and as far east as the western shores of Hudson Bay; the species is now found in Alaska, south through much of western Canada, and into portions of the northwestern United States (including Idaho, Montana, Washington, and Wyoming), extending as far south as Yellowstone and Grand Teton National Parks. It is most commonly found in Canada. In Canada, there are approximately 25,000 grizzly bears occupying British Columbia, Alberta, the Yukon, the Northwest Territories, Nunavut, and the northern part of Manitoba. An article published in 1954 suggested they may be present in the tundra areas of the Ungava Peninsula and the northern tip of Labrador-Quebec. In British Columbia, grizzly bears inhabit approximately 90% of their original territory. There were approximately 25,000 grizzly bears in British Columbia when the European settlers arrived. However, population size has since significantly decreased due to hunting and habitat loss. In 2003, researchers from the University of Alberta spotted a grizzly on Melville Island in the high Arctic, which is the most northerly sighting ever documented. In 2008, it was estimated there were 16,014 grizzly bears. Population estimates for British Columbia are based on hair-snagging, DNA-based inventories, mark-and-recapture, and a refined multiple regression model. A revised Grizzly bear count in 2012 for British Columbia was 15,075.

Question: are there grizzly bears on the east coast?
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Answer: yes

Text: Every positive number a has two square roots: a, which is positive, and a, which is negative. Together, these two roots are denoted as a (see shorthand). Although the principal square root of a positive number is only one of its two square roots, the designation ''the square root'' is often used to refer to the principal square root. For positive a, the principal square root can also be written in exponent notation, as a.

Question: does every positive number have 2 square roots?
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Answer:
yes