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 the fourth season episode ``In the Beginning,'' Dean is sent back through time by the angel Castiel. Dean meets his parents' former selves, and ends up convincing John to buy the 67 Chevy Impala that he eventually inherits. Dean later watches John being killed by Azazel, though the demon then resurrects him in exchange for Mary's permission to enter her house in ten years. When the angel Anna Milton travels back in time in the fifth season episode ``The Song Remains the Same'' to prevent the births of Sam and Dean, John agrees to serve as a temporary vessel for the archangel Michael to stop her. Michael subsequently kills Anna and erases John and Mary's memories of the incident.
 Question: does john come back to life in supernatural Context: ``Life Is a Highway'' is a song written by Tom Cochrane, from his 1991 album Mad Mad World. The song was Cochrane's most famous song, becoming a number one hit in his native Canada. The song also peaked at number six on the Billboard charts in the United States in 1992. The song has been covered by Rascal Flatts for the Cars soundtrack, as well as by Chris LeDoux, Jerry Jeff Walker, and Home Free.
 Question: did chris ledoux sing life is a highway Context: Oceanic lithosphere is less dense than asthenosphere for a few tens of millions of years but after this becomes increasingly denser than asthenosphere. This is because the chemically differentiated oceanic crust is lighter than asthenosphere, but thermal contraction of the mantle lithosphere makes it more dense than the asthenosphere. The gravitational instability of mature oceanic lithosphere has the effect that at subduction zones, oceanic lithosphere invariably sinks underneath the overriding lithosphere, which can be oceanic or continental. New oceanic lithosphere is constantly being produced at mid-ocean ridges and is recycled back to the mantle at subduction zones. As a result, oceanic lithosphere is much younger than continental lithosphere: the oldest oceanic lithosphere is about 170 million years old, while parts of the continental lithosphere are billions of years old. The oldest parts of continental lithosphere underlie cratons, and the mantle lithosphere there is thicker and less dense than typical; the relatively low density of such mantle ``roots of cratons'' helps to stabilize these regions.
 Question: is the oceanic crust part of the lithosphere Context: Navy divers work in extreme conditions, performing various underwater tasks ranging from underwater ship repair, underwater salvage and special operations/special warfare type diving. Because their area of operations are so varied, they can be required to utilize any type of diving equipment for use in any depth or temperature in any part of the world. Certain diving qualification allows NDs to live and work at extreme depths for days or weeks at a time, a discipline known as saturation diving.
 Question: does the navy still have deep sea divers
Yes
Yes
Yes
Yes
Yes