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: Double jeopardy is a procedural defence that prevents an accused person from being tried again on the same (or similar) charges and on the same facts, following a valid acquittal or conviction. As described by the U.S. Supreme Court in its unanimous decision one of its earliest cases dealing with double jeopardy, ``the prohibition is not against being twice punished, but against being twice put in jeopardy; and the accused, whether convicted or acquitted, is equally put in jeopardy at the first trial.''
 Question: can you be tried for the same crime twice Context: A ghost gun is a firearm without serial numbers. The term is used by gun control advocates, gun rights advocates, law enforcement, and some in the firearm industry. By making the gun themselves, owners may legally bypass background checks and registration regulations. Under U.S. federal law, the creation and possession of ghost guns is permitted, but a license is required to manufacture firearms for sale or distribution.
 Question: can you own a gun without serial number Context: The term hand luggage or cabin baggage (also commonly referred to as carry-on in North America) refers to the type of luggage that passengers are allowed to carry along in the passenger compartment of a vehicle instead of moving to the cargo compartment. Passengers are allowed to carry a limited number of smaller bags with them in the vehicle and contain valuables and items needed during the journey. There is normally storage space provided for hand luggage, either under seating, or in overhead lockers. Trains usually have luggage racks above the seats and may also (especially in the case of trains travelling longer distances) have luggage space between the backs of seats facing opposite directions, or in extra luggage racks, for example, at the ends of the carriage near the doors.
 Question: is hand baggage the same as carry on Context: This example shows that the Jacobian need not be a square matrix.
 Question: does the jacobian matrix have to be square Context: The two equal sides are called the legs and the third side is called the base of the triangle. The other dimensions of the triangle, such as its height, area, and perimeter, can be calculated by simple formulas from the lengths of the legs and base. Every isosceles triangle has an axis of symmetry along the perpendicular bisector of its base. The two angles opposite the legs are equal and are always acute, so the classification of the triangle as acute, right, or obtuse depends only on the angle between its two legs.
 Question: do all isosceles triangles have a right angle Context: The Conservative/Liberal Democrat Coalition formed after the 2010 general election announced that the ID card scheme would be scrapped. The Identity Cards Act was repealed by the Identity Documents Act 2010 on 21 January 2011, and the cards were invalidated with no refunds to purchasers. Foreign nationals from outside the European Union, however, continue to require an ID card for use as a biometric residence permit under the provisions of the UK Borders Act 2007 and the Borders, Citizenship and Immigration Act 2009.
 Question: are id cards still valid in the uk
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No