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 Black Sea has a positive water balance; that is, a net outflow of water 300 km (72 cu mi) per year through the Bosphorus and the Dardanelles into the Aegean Sea. Mediterranean water flows into the Black Sea as part of a two-way hydrological exchange. The Black Sea outflow is cooler and less saline, and floats over the warm, more saline Mediterranean inflow -- as a result of differences in density caused by differences in salinity -- leading to a significant anoxic layer well below the surface waters. The Black Sea drains into the Mediterranean Sea, via the Aegean Sea and various straits, and is navigable to the Atlantic Ocean. The Bosphorus Strait connects it to the Sea of Marmara, and the Strait of the Dardanelles connects that sea to the Aegean Sea region of the Mediterranean. These waters separate Eastern Europe, the Caucasus and Western Asia. The Black Sea is also connected to the Sea of Azov by the Strait of Kerch.
 Question: can you sail from the black sea to the mediterranean Context: In the early 10th century the Anglo-Saxon kingdoms, united by Æthelstan (r. 927--939), became part of the North Sea Empire of Cnut the Great, a personal union between England, Denmark and Norway. The Norman conquest of England in 1066 led to the transfer of the English capital city and chief royal residence from the Anglo-Saxon one at Winchester to Westminster, and the City of London quickly established itself as England's largest and principal commercial centre.
 Question: has the capital of england always been london Context: A 2018 study indicated that white sharks prefer to congregate deep in anticyclonic eddies in the North Atlantic Ocean. The sharks studied tended to favor the warm water eddies, spending the daytime hours at 450 meters and coming to the surface at night.
 Question: are there great white sharks in atlantic ocean Context: Various scripts adapted from Morrell's book had been pitched to studios in the years since its publication but it was only when Stallone decided to become involved with the project that it was finally brought into production. Stallone's star power after the success of the Rocky films enabled him to rewrite the script, to make the character of John Rambo more sympathetic. While Morrell's book has the Rambo character kill many of his pursuers, and Kozoll and Sackheim's draft had him killing sixteen people, in the movie Rambo does not directly cause the death of any police or national guardsmen. Stallone also decided to let Rambo survive the film instead of keeping the book's ending where he dies. A suicide scene was filmed but Kotcheff and Stallone opted to have Rambo turn himself in at Trautman's urging. Stallone did an estimated seven revisions of the script. Kotcheff requested further work be done on the script, which was performed by Larry Gross and David Giler.
 Question: is first blood based on a true story
Yes
Yes
No
Yes
No