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: Corned beef was used as a substitute for bacon by Irish-American immigrants in the late 19th century. Corned beef and cabbage is the Irish-American variant of the Irish dish of bacon and cabbage. A similar dish is the New England boiled dinner, consisting of corned beef, cabbage, and root vegetables such as carrots, turnips, and potatoes, which is popular in New England and another similar dish, Jiggs dinner, is popular in parts of Atlantic Canada.
 Question: is corned beef and cabbage traditional irish food Context: At present, the euro is legal tender in 19 out of 28 European Union member states, in addition to 5 countries not part of the EU (Monaco, San Marino, Vatican City, Andorra and Montenegro). The Republic of Kosovo also uses the euro, but is only partially recognised as an independent state.
 Question: the currency of all eu countries is the euro Context: DC's Legends of Tomorrow, or simply Legends of Tomorrow, is an American superhero television series developed by Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, and Phil Klemmer, who are also executive producers along with Sarah Schechter and Chris Fedak; Klemmer and Fedak serve as showrunners. The series, based on the characters of DC Comics, airs on The CW and is a spin-off featuring characters introduced in Arrow and The Flash along with new characters, set in the Arrowverse, the same fictional universe. The series premiered in January 2016. Legends of Tomorrow was renewed for a fourth season in April 2018, which is set to premiere on October 22, 2018.
 Question: is dc legends of tomorrow based on a comic Context: The National Aeronautics and Space Administration (NASA /ˈnæsə/) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
 Question: is nasa a part of the air force Context: According to the theory of relativity, no information can travel faster than the speed of light in vacuum, but this does not mean that the refractive index cannot be lower than 1. The refractive index measures the phase velocity of light, which does not carry information. The phase velocity is the speed at which the crests of the wave move and can be faster than the speed of light in vacuum, and thereby give a refractive index below 1. This can occur close to resonance frequencies, for absorbing media, in plasmas, and for X-rays. In the X-ray regime the refractive indices are lower than but very close to 1 (exceptions close to some resonance frequencies). As an example, water has a refractive index of 6999999999740000000♠0.99999974 = 1 − 6993260000000000000♠2.6×10 for X-ray radiation at a photon energy of 6985480652946099999♠30 keV (0.04 nm wavelength).
 Question: is it possible to have a refractive index less than 1
Yes
No
No
No
No
Yes