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 ground squirrels are members of the squirrel family of rodents (Sciuridae) which generally live on or in the ground, rather than trees. The term is most often used for the medium-sized ground squirrels, as the larger ones are more commonly known as marmots (genus Marmota) or prairie dogs, while the smaller and less bushy-tailed ground squirrels tend to be known as chipmunks. Together, they make up the ``marmot tribe'' of squirrels, Marmotini, and the large and mainly ground squirrel subfamily Xerinae, and containing six living genera. Well-known members of this largely Holarctic group are the marmots (Marmota), including the American groundhog, the chipmunks, the susliks (Spermophilus), and the prairie dogs (Cynomys). They are highly variable in size and habitus, but most are remarkably able to rise up on their hind legs and stand fully erect comfortably for prolonged periods. They also tend to be far more gregarious than other squirrels, and many live in colonies with complex social structures. Most Marmotini are rather short-tailed and large squirrels, and the alpine marmot (Marmota marmota) is the largest living member of the Sciuridae, at 53--73 cm in length and weighing 5--8 kg.
 Question: are ground squirrels and prairie dogs the same Context: Mayflies (also known as Canadian soldiers in the United States, or shadflies or fishflies in Canada and Michigan; also up-winged flies in the United Kingdom ) are aquatic insects belonging to the order Ephemeroptera. This order is part of an ancient group of insects termed the Palaeoptera, which also contains dragonflies and damselflies. Over 3,000 species of mayfly are known worldwide, grouped into over 400 genera in 42 families.
 Question: are canadian soldiers and mayflies the same thing Context: The Gregorian leap cycle, which has 97 leap days spread across 400 years, contains a whole number of weeks (20871). In every cycle there are 71 years with an additional 53rd week (corresponding to the Gregorian years that contain 53 Thursdays). An average year is exactly 52.1775 weeks long; months (1/12 year) average at exactly 4.348125 weeks.
 Question: are there ever 53 weeks in a year Context: Han Lue is a fictional character in The Fast and the Furious franchise. He first appears in The Fast and the Furious: Tokyo Drift as the mentor of Sean Boswell, dying in a collision in the film's climax. Han's status as a member of Dominic Toretto's crew was shown in the subsequent films Fast & Furious, Fast Five, Fast & Furious 6 and Furious 7, as well as the short film Los Bandoleros.
 Question: does han die in the end of tokyo drift Context: Williams was 21 when she received the script and Gosling committed to the production four years later, but filming did not begin until 2009, when Williams was 29, owing to Cianfrance's inability to find financing. The director was also unable to film the ``young'' and ``older'' scenes several years apart as he had hoped, again due to lack of money. The film was to be shot in California but production was moved to Brooklyn, New York and Honesdale, Pennsylvania. Williams wanted to stay close to her Brooklyn home to take care of her daughter, Matilda, so the director chose Honesdale due to its proximity to Brooklyn.
 Question: is blue valentine based on a true story
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