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 return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.
 Question: do you need to put return address on mail Context: There has been a great deal of debate in the past few years in the United Kingdom about whether to discourage cousin marriages through government public relations campaigns or ban them entirely. The debate has been prompted by a Pakistani immigrant population making up 1.5% of the British population, of whom about 50-70% marry a first cousin. In the 1980s researchers found that children to closely related Pakistani parents had an autosomal recessive condition rate of 4% compared to 0.1% for the European group. For example, Environment Minister (later Immigration Minister) Phil Woolas said in 2008, ``If you have a child with your cousin the likelihood is there'll be a genetic problem'' and that such marriages were the ``elephant in the room''. Physician Mohammad Walji has spoken out against the practice, saying that it is a ``very significant'' cause of infant death, and his practice has produced leaflets warning against it. However, Alan Bittles of the Centre for Comparative Genomics in Australia states that the risk of birth defects rises from roughly 2% in the general population to 4% for first cousins and therefore that ``It would be a mistake to ban it''. Aamra Darr of the University of Leeds has also criticized what she called an ``alarmist presentation of data'' that exaggerates the risk.
 Question: is it legal to marry your first cousin in england Context: In the United States, private ownership of a flamethrower is not restricted by federal law. Flamethrowers are legal in 48 states and restricted in California and Maryland.
 Question: is it legal to own a flamethrower in california Context: Washington has a 6.50% statewide sales tax. Local rates vary based on an individual's location at the point of purchase and can total up to 3.10% for a combined rate of 9.60%. In addition, due to the large number of Native American sovereign nations located within the state, sales-tax rates, if any, can vary based on state treaties with each nation.
 Question: is there sales tax in the state of washington Context: On January 17, 1941, seven days after the German--Soviet Border and Commercial Agreement, Molotov asked German officials whether the parties could then work out an agreement for entry into the Axis pact. Molotov expressed astonishment at the absence of any answer to the Soviets' November 25 offer to join the Pact. They never received an answer. On March 1, 1941, Bulgaria joined the Axis, which further unsettled Stalin when combined with Germany's continued ignoring of Stalin's November 25, 1940 Axis entry proposal. After six months of preparations, Germany invaded the Soviet Union on 22 June 1941, ending any hope for the proposed alliance.
 Question: was the soviet union a member of the axis powers
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