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: In May 2012, Sony Pictures Television had conversations with Amazon about picking up the series for a second season because of its international success. It won the ``Best Series'' at the Rose d'Or TV awards, Europe's equivalent of the Emmys. Unable to reach a deal with Amazon, the producers officially ended the series on June 20, 2012.
 Question: is there a second series of pan am Context: The Games have primarily been hosted in the continents of Europe (32 editions) and North America (12 editions); seven Games have been hosted in Asia and two have been hosted in Oceania. In 2010, Singapore became Southeast Asia's first Olympic host city for the inaugural Summer Youth Olympics, while Rio de Janeiro became South America's first Olympic host city with the 2016 Summer Olympics, followed by Buenos Aires with the 2018 Summer Youth Olympics. The 2022 Summer Youth Olympics in Dakar will become the first-ever Games to be held on the African continent. Other major geographic regions which have never hosted the Olympics include the Middle East, the Indian subcontinent, Central America and the Caribbean.
 Question: have the olympics ever been held in africa Context: Under Article One, representatives and senators are required to be U.S. citizens, but there is no requirement that they be natural born.
 Question: does a senator have to be a natural born citizen Context: In China, Facebook was blocked following the July 2009 Ürümqi riots because Xinjiang independence activists were using Facebook as part of their communications network. Some Chinese users also believed that Facebook would not succeed in China after Google China's problems. Renren (formerly Xiaonei) has many features similar to Facebook, and complies with PRC Government regulations regarding content filtering.
 Question: is it illegal to use facebook in china Context: The velocity with which the reaction process propagates in the mass of the explosive. Most commercial mining explosives have detonation velocities ranging from 1800 m/s to 8000 m/s. Today, velocity of detonation can be measured with accuracy. Together with density it is an important element influencing the yield of the energy transmitted for both atmospheric over-pressure and ground acceleration. By definition, a ``low explosive,'' such as black powder, or smokeless gunpowder has a burn rate of 171--631 m/s. In contrast, a ``high explosive,'' whether a primary, such as detonating cord, or a secondary, such as TNT or C-4 has a significantly higher burn rate.
 Question: tnt is an example of a high explosive
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