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: Water stagnation occurs when water stops flowing. Stagnant water can be a major environmental hazard.
 Question: is it safe to swim in stagnant water Context: Unlike oxidative phosphorylation, oxidation and phosphorylation are not coupled in the process of substrate-level phosphorylation, and reactive intermediates are most often gained in the course of oxidation processes in catabolism. Most ATP is generated by oxidative phosphorylation in aerobic or anaerobic respiration while substrate-level phosphorylation provides a quicker, less efficient source of ATP, independent of external electron acceptors. This is the case in human erythrocytes, which have no mitochondria, and in oxygen-depleted muscle.
 Question: can substrate level phosphorylation occur in the absence of oxygen Context: Two-stroke oil (also referred to as two-cycle oil, 2-cycle oil, 2T oil, 2-stroke oil or petroil) is a special type of motor oil intended for use in crankcase compression two-stroke engines.
 Question: is there a difference between 2stroke and 2-cycle oil Context: A set is won by the first side to win 6 games, with a margin of at least 2 games over the other side (e.g. 6--3 or 7--5). There is usually a tie-break if the set is tied at six games per player.
 Question: do you have to win by 2 games in tennis Context: Boston is a town and small port in Lincolnshire, on the east coast of England, approximately 100 miles (160 km) north of London. It is the largest town of the wider Borough of Boston local government district. The borough had a total population of 66,900, at the ONS mid-2015 estimates, while the town itself had a population of 35,124 at the 2001 census. It is due north of Greenwich on the Prime Meridian.
 Question: is there a place called boston in england Context: Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations.
 Question: was the us part of the league of nations Context: Because there are no permanent human settlements south of the Antarctic Circle, apart from research stations, the countries and territories whose populations experience the midnight sun are limited to those crossed by the Arctic Circle: the Canadian Yukon, Nunavut, and Northwest Territories; the nations of Iceland, Finland, Norway, Sweden, Denmark (Greenland), Russia; and the State of Alaska in the United States. A quarter of Finland's territory lies north of the Arctic Circle, and at the country's northernmost point the sun does not set at all for 60 days during summer. In Svalbard, Norway, the northernmost inhabited region of Europe, there is no sunset from approximately 19 April to 23 August. The extreme sites are the poles, where the sun can be continuously visible for half the year. The North Pole has midnight sun for 6 months from late March to late September.
 Question: does the sun not go down in alaska
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