Context: Death from laughter is a rare form of death, usually resulting from cardiac arrest or asphyxiation, caused by a fit of laughter. Instances of death by laughter have been recorded from the times of ancient Greece to the modern day.
 Question: can you have a heart attack from laughing Context: At the time of the explosion, there were 126 crew on board; seven were employees of BP, 79 of Transocean, there were also employees of various other companies involved in the operation of the rig, including Anadarko, Halliburton and M-I SWACO. Eleven workers were presumed killed in the initial explosion. The rig was evacuated, with injured workers airlifted to medical facilities. After approximately 36 hours, Deepwater Horizon sank on 22 April 2010. The remains of the rig were located resting on the seafloor approximately 5,000 ft (1,500 m) deep at that location, and about 1,300 ft (400 m) (quarter of a mile) northwest of the well.
 Question: is the deepwater horizon still on the ocean floor Context: The ``Dark Ages'' is a historical periodization, traditionally referring to the Middle Ages, that asserts that a demographic, cultural and economic deterioration occurred in Western Europe following the decline of the Roman Empire.
 Question: are the dark ages and middle ages the same Context: Darden Restaurants, Inc. is an American multi-brand restaurant operator headquartered in Orlando. As of April 2017, the firm owns two fine dining restaurant chains: Eddie V's Prime Seafood and The Capital Grille; and six casual dining restaurant chains: Olive Garden, LongHorn Steakhouse, Bahama Breeze, Seasons 52, Yard House and Cheddar's Scratch Kitchen (the latter having been acquired on April 24, 2017). Until July 28, 2014, Darden also owned Red Lobster. Darden has more than 1,500 restaurant locations and more than 150,000 employees, making it the world's largest full-service restaurant company. As of 2012, Darden is the only Fortune 500 company with its corporate headquarters in Greater Orlando.
 Question: is red lobster still a part of darden Context: The groundhog (Marmota monax), also known as a woodchuck, is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. It was first scientifically described by Carl Linnaeus in 1758. The groundhog is also referred to as a chuck, wood-shock, groundpig, whistlepig, whistler, thickwood badger, Canada marmot, monax, moonack, weenusk, red monk and, among French Canadians in eastern Canada, siffleux. The name ``thickwood badger'' was given in the Northwest to distinguish the animal from the prairie badger. Monax was a Native American name of the woodchuck, which meant ``the digger''. Young groundhogs may be called chucklings. Other marmots, such as the yellow-bellied and hoary marmots, live in rocky and mountainous areas, but the groundhog is a lowland creature. It is found through much of the eastern United States across Canada and into Alaska
 Question: are ground hogs and woodchucks the same animal Context: The identity of the pole stars gradually changes over time because the celestial poles exhibit a slow continuous drift through the star field. The primary reason for this is the precession of Earth's rotational axis, which causes its orientation to change over time. Precession causes the celestial poles to trace out circles on the celestial sphere approximately once every 26,000 years, passing close to different stars at different times (with an additional slight shift due to the proper motion of the stars).
 Question: has polaris always been the north star also known as the pole star
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