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 fifth season of the television sitcom Brooklyn Nine-Nine premiered September 26, 2017 on Fox. It is the final season to air on Fox, as the series was cancelled on May 10, 2018, before NBC picked it up for a sixth season on May 11, 2018.
 Question: is there a season 5 of brooklyn nine-nine Context: The Darth Vader grotesque is a limestone grotesque by Jay Hall Carpenter. It is located at the Washington National Cathedral, Northwest, Washington, D.C., United States.
 Question: is there a darth vader gargoyle on the national cathedral Context: Canola oil, or canola for short, is a vegetable oil derived from a variety of rapeseed that is low in erucic acid, as opposed to colza oil. There are both edible and industrial forms produced from the seed of any of several cultivars of the plant family Brassicaceae, namely cultivars of Brassica napus L., Brassica rapa subsp. oleifera, syn. B. campestris L. or Brassica juncea, which are also referred to as ``canola''. According to the Canola Council of Canada, an industry association, the official definition of canola is ``Seeds of the genus Brassica (Brassica napus, Brassica rapa or Brassica juncea) from which the oil shall contain less than 2% erucic acid in its fatty acid profile and the solid component shall contain less than 30 micromoles of any one or any mixture of 3-butenyl glucosinolate, 4-pentenyl glucosinolate, 2-hydroxy-3 butenyl glucosinolate, and 2-hydroxy- 4-pentenyl glucosinolate per gram of air-dry, oil-free solid.''
 Question: is there such a thing as a canola plant Context: The use of toxic chemicals as weapons dates back thousands of years, but the first large scale use of chemical weapons was during World War I. They were primarily used to demoralize, injure, and kill entrenched defenders, against whom the indiscriminate and generally very slow-moving or static nature of gas clouds would be most effective. The types of weapons employed ranged from disabling chemicals, such as tear gas, to lethal agents like phosgene, chlorine, and mustard gas. This chemical warfare was a major component of the first global war and first total war of the 20th century. The killing capacity of gas was limited, with about ninety thousand fatalities from a total of 1.3 million casualties caused by gas attacks. Gas was unlike most other weapons of the period because it was possible to develop countermeasures, such as gas masks. In the later stages of the war, as the use of gas increased, its overall effectiveness diminished. The widespread use of these agents of chemical warfare, and wartime advances in the composition of high explosives, gave rise to an occasionally expressed view of World War I as ``the chemist's war'' and also the era where weapons of mass destruction were created.
 Question: was there chemical warfare in world war 1
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