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 first ideas about light being used in photosynthesis were proposed by Colin Flannery in 1779 who recognized it was sunlight falling on plants that was required, although Joseph Priestley had noted the production of oxygen without the association with light in 1772. Cornelis Van Niel proposed in 1931 that photosynthesis is a case of general mechanism where a photon of light is used to photo decompose a hydrogen donor and the hydrogen being used to reduce CO . Then in 1939, Robin Hill showed that isolated chloroplasts would make oxygen, but not fix CO showing the light and dark reactions occurred in different places. Although they are referred to as light and dark reactions, both of them take place only in the presence of light. This led later to the discovery of photosystems I and II.
 Question: can light reactions take place in the dark Context: There are still some ways in which a person may have dual citizenship of India and another country, including:
 Question: is it possible to have dual citizenship in india Context: A wolfdog is a canine produced by the mating of a domestic dog (Canis lupus familiaris) with a gray wolf (Canis lupus), or by mating a domestic dog with either the eastern timber wolf (Canis lycaon), red wolf (Canis rufus), or ethiopian wolf (Canis simensis) to produce a hybrid.
 Question: is there such thing as a wolf dog Context: In June 2017, Ubisoft announced that it would release an expansion pack for its winter sports video game Steep entitled Road to the Olympics, which features new game modes and content inspired by the 2018 Winter Olympics.
 Question: will there be a winter olympics video game Context: Roy Orbison and Friends: A Black and White Night is a 1988 Cinemax television special originally broadcast on January 3, 1988, starring triple Hall of Fame inductee (Rock and Roll Hall of Fame, Nashville Songwriters Hall of Fame and Songwriters Hall of Fame) rock/pop singer/songwriter Roy Orbison and backing band TCB Band with special guests including Bruce Springsteen, k.d. lang and others. The special was filmed entirely in black and white. After the broadcast the concert was released on VHS and Laserdisc. A live album was released in 1989.
 Question: did bruce springsteen play with roy orbison's band Context: The Blue Lagoon is a 1980 American romantic survival drama film directed by Randal Kleiser from a screenplay written by Douglas Day Stewart based on the 1908 novel of the same name by Henry De Vere Stacpoole. The film stars Brooke Shields and Christopher Atkins. The music score was composed by Basil Poledouris and the cinematography was by Néstor Almendros.
 Question: is blue lagoon based on a true story
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