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: Keystone Corridor: According to Transrapid, Inc., Pittsburgh has the most advanced maglev initiative in the U.S., followed by the Las Vegas project. Once federal funding is finalized, these two markets could be the first to see maglev in the United States. Initially, the project calls for a transrapid system throughout the metro Pittsburgh area. Further planning calls for extensions eastward to Harrisburg and Philadelphia. Upon completion, a commute from Pittsburgh to Philadelphia would be reduced to 90--120 minutes. A commuter traversing the Pennsylvania Turnpike would currently spend approximately 5hrs if traveling at the speed limit.
 Question: are there any maglev trains in the united states Context: The film's mainstream success had backed up the initial idea of making a trilogy. The sequels, The Matrix Reloaded and The Matrix Revolutions, were filmed simultaneously during one shoot (under the project codename ``The Burly Man''), and released in two parts in 2003. They tell the story of the impending attack on the human enclave of Zion by a vast machine army. Neo also learns more about the history of the Matrix and his role as The One. The sequels also incorporate more ambitious action scenes and visual effects.
 Question: was the matrix originally supposed to be a trilogy Context: When dimensional locations are given as ordered lists of numbers such as (t,x,y,z) they are called vectors or n-tuples. It is only when such locations are linked together into more complicated shapes that the full richness and geometric complexity of 4D and higher spaces emerges. A hint of that complexity can be seen in the accompanying animation of one of simplest possible 4D objects, the 4D cube or tesseract.
 Question: is there such thing as a 4d shape Context: The Major League Baseball postseason is an elimination tournament held after the conclusion of the MLB regular season. As of 2012, the playoffs for each league--American and National--consist of a one-game wild-card playoff between two wild card teams, two best-of-five Division Series (LDS) featuring the wild-card winner and the winner of each division, and finally the best-of-seven League Championship Series (LCS). The winners of the American League Championship Series (ALCS) and the National League Championship Series (NLCS) play each other in the best-of-seven World Series.
 Question: are all mlb playoff games best of 7 Context: A queen ant (formally known as a gyne) is an adult, reproducing female ant in an ant colony; generally she will be the mother of all the other ants in that colony. Some female ants, such as Cataglyphis cursor, do not need to mate to produce offspring, reproducing through asexual parthenogenesis or cloning, and all of those offspring will be female. Others, like those in the genus Crematogaster, mate in a nuptial flight. Queen offspring develop from larvae specially fed in order to become sexually mature among most species. Depending on the species, there can be either a single mother queen, or potentially, hundreds of fertile queens in some species. Queen ants have one of the longest life-spans of any known insect -- up to 30 years. A queen of Lasius niger was held in captivity by German entomologist Hermann Appel for 283⁄4 years; also a Pogonomyrmex owyheei has a maximum estimated longevity of 30 years in the field.
 Question: is there a queen in an ant colony
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