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: Former presidents were entitled from 1965 to 1996 to lifetime Secret Service protection, for themselves, spouses, and children under 16. A 1994 statute, (Pub.L. 103--329), limited post-presidential protection to ten years for presidents inaugurated after January 1, 1997. Under this statute, Bill Clinton would still be entitled to lifetime protection, and all subsequent presidents would have been entitled to ten years' protection. On January 10, 2013, President Barack Obama signed the Former Presidents Protection Act of 2012, reinstating lifetime Secret Service protection for his predecessor George W. Bush, himself, and all subsequent presidents.
 Question: do first ladies get secret service protection for life Context: An intuitive argument can also be used to show that the flux density outside the solenoid is actually zero. Magnetic field lines only exist as loops, they cannot diverge from or converge to a point like electric field lines can (see Gauss's law for magnetism). The magnetic field lines follow the longitudinal path of the solenoid inside, so they must go in the opposite direction outside of the solenoid so that the lines can form a loop. However, the volume outside the solenoid is much greater than the volume inside, so the density of magnetic field lines outside is greatly reduced. Now recall that the field outside is constant. In order for the total number of field lines to be conserved, the field outside must go to zero as the solenoid gets longer.
 Question: is there a magnetic field outside a solenoid Context: Twenty-two years after Mary's death, John disappears while on a hunt, forcing Sam and Dean to reunite in an unsuccessful attempt to find him. Sam returns to the life of a hunter after Azazel kills his girlfriend. John reluctantly chooses to avoid his sons throughout most of the season while he investigates something, eventually reuniting with them in the episode ``Shadow.'' However, the demonic Meg Masters attacks them and reveals that Azazel is after John. After escaping from Meg, the brothers split up from their father to keep him from the demons. When vampires murder his old mentor and steal the Colt--a mystical gun capable of killing anything--John teams up with Sam and Dean in ``Dead Man's Blood'' to retrieve it. Because demons cannot be killed by conventional means, they hope that the Colt will be effective against Azazel. In response, Meg begins killing the Winchesters' friends in ``Salvation,'' and threatens to kill more unless they deliver the Colt. John is captured after trying to give her a fake gun, and reveals himself to be possessed by Azazel when the brothers come to his rescue in the first season finale ``Devil's Trap.'' However, he manages to resist the demon's control. Despite John's pleas for Sam to shoot him with the Colt, Sam cannot bring himself to do so and allows Azazel to escape. As the Winchesters flee in Dean's Impala, a demonically-possessed trucker crashes into them.
 Question: do they ever find the dad in supernatural
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