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: It is derived from the 19th-century Irish ballad ``The Wexford Girl'', itself derived from the earlier English ballad ``The Bloody Miller or Hanged I Shall Be'' about a murder in 1683 at Hogstow Mill 12 miles south of Shrewsbury. This ballad was collected by Samuel Pepys who wrote about the murder of Anne Nichols by the Mill's apprentice Francis Cooper. Other versions are known as the ``Waxweed Girl'', ``The Wexford Murder''. These are in turn derived from Elizabethan era poem or broadside ballad, ``The Cruel Miller''.
 Question: was the song knoxville girl based on a true story Context: The phase velocity of an electromagnetic wave, when traveling through a medium, can routinely exceed c, the vacuum velocity of light. For example, this occurs in most glasses at X-ray frequencies. However, the phase velocity of a wave corresponds to the propagation speed of a theoretical single-frequency (purely monochromatic) component of the wave at that frequency. Such a wave component must be infinite in extent and of constant amplitude (otherwise it is not truly monochromatic), and so cannot convey any information. Thus a phase velocity above c does not imply the propagation of signals with a velocity above c.
 Question: can phase velocity be greater than speed of light Context: Topanga is a census-designated place (CDP) in western Los Angeles County, California, United States. Located in the Santa Monica Mountains, the community lies in Topanga Canyon. The narrow southern portion of Topanga at the coast is in between the city of Malibu and the city of Los Angeles neighborhood of Pacific Palisades. Topanga had a population of 8,289 as of 2010. The ZIP code is 90290 and the area code is primarily 310, with 818 only at the north end of the canyon. It is in the 3rd County Supervisorial district.
 Question: is topanga in the city of los angeles Context: The Delphi method (/ˈdɛlfaɪ/ DEL-fy) is a structured communication technique or method, originally developed as a systematic, interactive forecasting method which relies on a panel of experts. The experts answer questionnaires in two or more rounds. After each round, a facilitator or change agent provides an anonymised summary of the experts' forecasts from the previous round as well as the reasons they provided for their judgments. Thus, experts are encouraged to revise their earlier answers in light of the replies of other members of their panel. It is believed that during this process the range of the answers will decrease and the group will converge towards the ``correct'' answer. Finally, the process is stopped after a predefined stop criterion (e.g. number of rounds, achievement of consensus, stability of results) and the mean or median scores of the final rounds determine the results.
 Question: delphi group decision making is used to develop consensus among a group of experts
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