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: Persons driving into Canada must have their vehicle's registration document and proof of insurance.
 Question: do i need car registration to enter canada Context: The cougar (Puma concolor), also commonly known as the puma, mountain lion, panther, or catamount, is a large felid of the subfamily Felinae native to the Americas. Its range, from the Canadian Yukon to the southern Andes of South America, is the widest of any large wild terrestrial mammal in the Western Hemisphere. An adaptable, generalist species, the cougar is found in most American habitat types. It is the biggest cat in North America and the second-heaviest cat in the New World after the jaguar. Secretive and largely solitary by nature, the cougar is properly considered both nocturnal and crepuscular, although daytime sightings do occur. The cougar is more closely related to smaller felines, including the domestic cat (subfamily Felinae), than to any species of subfamily Pantherinae, of which only the jaguar is native to the Americas.
 Question: is a mountain lion and cougar the same thing Context: The Speaker of the House is the presiding officer of the United States House of Representatives. The office was established in 1789 by Article I, Section 2 of the United States Constitution. The Speaker is the political and parliamentary leader of the House of Representatives, and is simultaneously the House's presiding officer, leader of the body's majority party, and the institution's administrative head. Speakers also perform various other administrative and procedural functions. Given these several roles and responsibilities, the Speaker usually does not personally preside over debates. That duty is instead delegated to members of the House from the majority party. Neither does the Speaker regularly participate in floor debates or vote.
 Question: the presiding officer of the house is the speaker of the house constitution Context: Although Star Alliance invited Lineas Aereas Azteca in 2005 to join in mid-2007, the airline filed for bankruptcy. TAP Air Portugal joined on 14 March 2005, adding African destinations to the network. In April 2006 Swiss International Air Lines, the alliance's sixth European airline, and South African Airways (its first African carrier) became the 17th and 18th members.
 Question: is swiss air a member of star alliance Context: During the American Civil War, the Union was the first to field a submarine. The French-designed Alligator was the first U.S. Navy sub and the first to feature compressed air (for air supply) and an air filtration system. It was the first submarine to carry a diver lock, which allowed a diver to plant electrically detonated mines on enemy ships. Initially hand-powered by oars, it was converted after 6 months to a screw propeller powered by a hand crank. With a crew of 20, it was larger than Confederate submarines. Alligator was 47 feet (14 m) long and about 4 feet (1.2 m) in diameter. It was lost in a storm off Cape Hatteras on April 1, 1863, while uncrewed and under tow to its first combat deployment at Charleston.
 Question: did they use submarines in the civil war
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