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: Though a wood bat is legal in NCAA competition, players overwhelmingly prefer and use a metal bat. The metal bat was implemented in college baseball in 1975. Use of a metal bat is somewhat controversial. Supporters of an aluminum or composite bat note that it can increase offensive performance, as the speed of a ball off a metal bat is generally faster than off a wood bat. Those against metal, and for wood, argue that a metal bat is not safe to use, and that a metal bat doesn't prepare players for the next level, as professional baseball uses a wood bat exclusively. In the 2011 season the NCAA changed the requirements for a metal bat, reducing the maximum allowed exit speed in a way that is said to produce a feeling more like a wood bat. As a result, in 2011 there was a drop-off in overall ``long'' drives or home runs relative to past years.
 Question: can you use wood bats in college baseball Context: Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice. It can exist either in an anhydrous (water-free) form or as a monohydrate. The anhydrous form crystallizes from hot water, while the monohydrate forms when citric acid is crystallized from cold water. The monohydrate can be converted to the anhydrous form at about 78 °C. Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C. It decomposes with loss of carbon dioxide above about 175 °C.
 Question: is lemon juice the same as citric acid Context: Burns that affect only the superficial skin layers are known as superficial or first-degree burns. They appear red without blisters and pain typically lasts around three days. When the injury extends into some of the underlying skin layer, it is a partial-thickness or second-degree burn. Blisters are frequently present and they are often very painful. Healing can require up to eight weeks and scarring may occur. In a full-thickness or third-degree burn, the injury extends to all layers of the skin. Often there is no pain and the burnt area is stiff. Healing typically does not occur on its own. A fourth-degree burn additionally involves injury to deeper tissues, such as muscle, tendons, or bone. The burn is often black and frequently leads to loss of the burned part.
 Question: is there such a thing as 4th degree burns Context: Gangs of New York is a 2002 American epic period drama film directed by Martin Scorsese, set in the mid-19th century in the Five Points district of New York City. The screenplay is by Jay Cocks, Steven Zaillian, and Kenneth Lonergan. It was inspired by Herbert Asbury's 1927 non-fiction book, The Gangs of New York. It was made in Cinecittà, Rome, distributed by Miramax Films and nominated for numerous awards, including the Academy Award for Best Picture, among nine other Oscar nominations.
 Question: the movie gangs of new york is it a true story
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