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 maximum operating speed is 320 km/h (200 mph) (on a 387.5 km section of the Tōhoku Shinkansen). Test runs have reached 443 km/h (275 mph) for conventional rail in 1996, and up to a world record 603 km/h (375 mph) for maglev trains in April 2015.
 Question: is the shinkansen the fastest train in the world Context: Quinn along with the New Directions alumni return in the episode ``Homecoming'' to help Rachel and Kurt rebuild the New Directions. Quinn, Santana, and Brittany attempt to recruit new members by performing in Cheerios Alumni outfits, but only recruit twins Mason and Madison when former Glee new member, Kitty, who was the only member not to be transferred as Sue saw her as a star player, announced she wouldn't return because of the way Artie treated her and everyone else when he left. Puck is still her boyfriend. She appears in ``Jagged Little Tapestry'' along with Tina to help Becky convince her new boyfriend that she is in every club of the school. Quinn, Tina, Sue, and Coach Roz get a huge surprise when they find out that Becky's boyfriend, Darrell, does not have Down syndrome like Becky does. They all get a big lesson when they confront him and realize that a person with Down syndrome should be treated like everyone else. Despite being Santana and Brittany's best friend, she is notably absent during their wedding in ``A Wedding''. She is mentioned several times during the Pilot's parallel episode ``2009'', as Finn's cheerleader girlfriend. She is later seen during Don't Stop Believin' watching the performance with Sue and Santana. She returns in the last minutes of the series finale ``Dreams Come True'' performing backing vocals for I Lived with the rest of the Glee Cast for the re-dedication of the Auditorium.
 Question: is quinn in the last episode of glee Context: Calcium carbide is a chemical compound with the chemical formula of CaC. Its main use industrially is in the production of acetylene and calcium cyanamide.
 Question: calcium carbide cac2 is the raw material for the production of acetylene Context: Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O ) at increased partial pressures. It is also known as oxygen toxicity syndrome, oxygen intoxication, and oxygen poisoning. Historically, the central nervous system condition was called the Paul Bert effect, and the pulmonary condition the Lorrain Smith effect, after the researchers who pioneered its discovery and description in the late 19th century. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs and eyes. Oxygen toxicity is a concern for underwater divers, those on high concentrations of supplemental oxygen (particularly premature babies), and those undergoing hyperbaric oxygen therapy.
 Question: can you have too much oxygen in your lungs
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