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: While the agreement remains controversial to this day, it is no longer at the forefront of Canadian politics. It was superseded by the North American Free Trade Agreement (NAFTA) in 1994. The Liberals under Jean Chrétien were elected to office in the 1993 election, partly on a promise to renegotiate key labor and environmental parts of NAFTA. An agreement was indeed struck with the Democrats under Bill Clinton that created separate side deals to address both of these concerns.
 Question: does canada have free trade with the us Context: In chemistry, pH (/piːˈeɪtʃ/) is a logarithmic scale used to specify the acidity or basicity of an aqueous solution. It is approximately the negative of the base 10 logarithm of the molar concentration, measured in units of moles per liter, of hydrogen ions. More precisely it is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are basic. Pure water is neutral, at pH 7 (25 °C), being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.
 Question: is it possible for ph to be negative Context: The Disneyland ALWEG Monorail opened on June 14, 1959, as a sightseeing attraction in Tomorrowland in Disneyland, along with the Disneyland Expansion with the Matterhorn Bobsleds, the Submarine Voyage, the expanded version of Autopia, and the Motor Boat Cruise. The Mark I trains (Red and Blue) consisted of three cars each. In 1961 it became a true transportation system when Tomorrowland station was lengthened to accommodate the debut of the four-car Mark II and the additional new Yellow train; the track was extended 21⁄2 miles outside the park and a second platform was constructed -- the Disneyland Hotel station. In 1968 Mark III Monorail Green joined the fleet, and both platforms were lengthened for the arrival of the more streamlined and efficient five-car Mark III monorail train conversions.
 Question: does the disneyland monorail stop at the disneyland hotel Context: Carnitine (β-hydroxy-γ-N-trimethylaminobutyric acid, 3-hydroxy-4-N,N,N-trimethylaminobutyrate) is a quaternary ammonium compound involved in metabolism in most mammals, plants and some bacteria. Carnitine may exist in two isomers, labeled D-carnitine and L-carnitine, as they are optically active. At room temperature, pure carnitine is a white powder, and a water-soluble zwitterion with low toxicity. Carnitine only exists in animals as the L-enantiomer, and D-carnitine is toxic because it inhibits the activity of L-carnitine. Carnitine, derived from an amino acid, is found in nearly all organisms and animal tissue. Carnitine is the generic expression for a number of compounds that include L-carnitine, acetyl-L-carnitine, and propionyl-L-carnitine. It is most accumulated in cardiac and skeletal muscles as it accounts for 0.1% of its dry matter. It was first derived from meat extracts in 1905, therefore the name carnitine is derived from Latin ``carnus'' or flesh. The body synthesizes enough carnitine from lysine side chains to keep up with the needs of energy production in the body as carnitine acts as a transporter of long-chain fatty acids into the mitochondria to be oxidized and produce energy. Some individuals with genetic or medical disorders (like preterm infants) cannot make enough, so this makes carnitine a conditionally essential nutrient for them.
 Question: is carnitine the same as l-carnitine
Yes
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