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: The Kentucky Derby was first run at 1 1/2 miles (12 furlongs; 2.4 km) the same distance as the Epsom Derby. The distance was changed in 1896 to its current 1 1/4 miles (10 furlongs; 2 km). On May 17, 1875, in front of an estimated crowd of 10,000 people, a field of 15 three-year-old horses contested the first Derby. Under jockey Oliver Lewis, a colt named Aristides, who was trained by future Hall of Famer Ansel Williamson, won the inaugural Derby. Later that year, Lewis rode Aristides to a second-place finish in the Belmont Stakes.
 Question: are there always 20 horses in kentucky derby Context: The cake has a firm yet light texture. It is eaten with tea or (occasionally) for breakfast and is traditionally flavoured with lemon. Dating back to an original recipe in the 18th or 19th century, Madeira cake is similar to a pound cake or yellow cake. One of the earliest published recipes was by Eliza Acton in her Modern Cookery for Private Families (1845):
 Question: is pound cake the same as madeira cake Context: A surge protector (or surge suppressor or surge diverter) is an appliance or device designed to protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold. This article primarily discusses specifications and components relevant to the type of protector that diverts (shorts) a voltage spike to ground; however, there is some coverage of other methods.
 Question: is a surge protector the same as a surge suppressor Context: In conjunction with a rook, the king may make a special move called castling, in which the king moves two squares toward one of its rooks and then the rook is placed on the square over which the king crossed. Castling is allowed only when neither the king nor the castling rook has previously moved, no squares between them are occupied, the king is not in check, and the king will not move across or end its movement on a square that is under enemy attack.
 Question: can the king move 2 spaces in chess Context: Bullets fired into the air usually fall back with terminal velocities much lower than their muzzle velocity when they leave the barrel of a firearm. Nevertheless, people can be injured, sometimes fatally, when bullets discharged into the air fall back down to the ground. Bullets fired at angles less than vertical are more dangerous as the bullet maintains its angular ballistic trajectory and is far less likely to engage in tumbling motion; it therefore travels at speeds much higher than a bullet in free fall.
 Question: can a bullet fired into the air kill
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