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: Castling consists of moving the king two squares towards a rook on the player's first rank , then moving the rook to the square over which the king crossed. Castling may only be done if the king has never moved, the rook involved has never moved, the squares between the king and the rook involved are unoccupied, the king is not in check, and the king does not cross over or end on a square in which it would be in check. Castling is one of the rules of chess and is technically a king move (Hooper & Whyld 1992:71).
 Question: can you use castling to get out of check Context: Many of the varieties that have been cultivated for ornamental use produce small, unpalatable fruit. Edible cherries generally come from cultivars of the related species Prunus avium and Prunus cerasus.
 Question: are cherry blossom trees the same as cherry trees Context: To maintain lactation, a dairy cow must be bred and produce calves. Depending on market conditions, the cow may be bred with a ``dairy bull'' or a ``beef bull.'' Female calves (heifers) with dairy breeding may be kept as replacement cows for the dairy herd. If a replacement cow turns out to be a substandard producer of milk, she then goes to market and can be slaughtered for beef. Male calves can either be used later as a breeding bull or sold and used for veal or beef. Dairy farmers usually begin breeding or artificially inseminating heifers around 13 months of age. A cow's gestation period is approximately nine months. Newborn calves are removed from their mothers quickly, usually within three days, as the mother/calf bond intensifies over time and delayed separation can cause extreme stress on both cow and calf.
 Question: do cows only produce milk when they have babies Context: In the 1994 TV documentary Hocus Pocus: Begin the Magic, and on the film's Blu-ray release, producer David Kirschner said he came up with the idea for the film one night. He and his young daughter were sitting outside and his neighbor's black cat strayed by. Kirschner invented a tale of how the cat was once a boy who was changed into a feline three hundred years ago by three witches.
 Question: is hocus pocus based on a true story Context: A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It is also a valve used in air brake systems on heavy trucks.
 Question: is a double check valve the same as a backflow preventer Context: Recruit training, more commonly known as basic training or colloquially boot camp, refers to the initial instruction of new military personnel. Recruit training is a physically and psychologically intensive process, which resocializes its subjects for the demands of military employment.
 Question: is basic training the same as boot camp
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