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: It was long believed that carbonic acid could not exist as a pure compound. However, in 1991 scientists at NASA's Goddard Space Flight Center (USA) succeeded in making solid HCO samples. They did so by exposing a frozen mixture of water and carbon dioxide to high-energy proton radiation, and then warming to remove the excess water. The carbonic acid that remained was characterized by infrared spectroscopy. The fact that the carbonic acid was prepared by irradiating a solid HO + CO mixture, or even by irradiation of dry ice alone, has given rise to suggestions that HCO might be found in outer space or on Mars, where frozen ices of HO and CO are found, as well as cosmic rays. It was announced in 1993 that solid carbonic acid had been created by a cryogenic reaction of potassium bicarbonate and HCl dissolved in methanol. Later work showed that in fact the methyl ester had been formed, but other methods were successful. Theoretical calculations showed that a single molecule of water can catalyze the decomposition of a gas-phase carbonic acid molecule to carbon dioxide and water. In the absence of water, the dissociation of gaseous carbonic acid has been predicted to be very slow, with a half-life of 180,000 years. This only applies if the molecules are few and far between, because it has also been predicted that gas-phase carbonic acid will catalyze its own decomposition by forming dimers, which then break apart into two molecules each of water and carbon dioxide.
 Question: does carbonic acid decompose into water and carbon dioxide Context: Children's Day observations in the United States predate both Mother's and Father's Day, though a permanent annual single Children's Day observation is not made at the national level.
 Question: is there a children's day in america Context: A sequel, tentatively titled Star Wars: Episode IX, is scheduled for December 20, 2019.
 Question: is the last jedi the last star wars film Context: American car manufacturers Nash (in 1949) and Ford (in 1955) offered seat belts as options, while Swedish Saab first introduced seat belts as standard in 1958. After the Saab GT 750 was introduced at the New York Motor Show in 1958 with safety belts fitted as standard, the practice became commonplace.
 Question: did cars have seat belts in the 1950s Context: Sunny Delight, marketed as SunnyD in some regions, is an orange colored drink developed by Doric Foods of Mount Dora, Florida in 1963. It grew so popular that additional plants were built in California and Ohio in 1974 and 1978, respectively. In 1983, Sundor Brands bought out Doric Foods; Sundor Brands was then purchased by Procter & Gamble in 1989.
 Question: is sunny d and sunny delight the same thing
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