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: Black Swan is a 2010 American psychological horror film directed by Darren Aronofsky. The screenplay was written by Mark Heyman, John McLaughlin, and Andres Heinz, based on an original story by Heinz. The film stars Natalie Portman, Vincent Cassel, Mila Kunis, Barbara Hershey and Winona Ryder. The plot revolves around a production of Tchaikovsky's Swan Lake ballet by a prestigious New York City ballet company. The production requires a ballerina to play the innocent and fragile White Swan, for which the committed dancer Nina (Portman) is a perfect fit, as well as the dark and sensual Black Swan, which are qualities better embodied by the new arrival Lily (Kunis). Nina is overwhelmed by a feeling of immense pressure when she finds herself competing for the part, causing her to lose her tenuous grip on reality and descend into a living nightmare.
 Question: is black swan movie based on a book Context: Estrogens are synthesized in all vertebrates as well as some insects. Their presence in both vertebrates and insects suggests that estrogenic sex hormones have an ancient evolutionary history. The three major naturally occurring forms of estrogen in females are estrone (E1), estradiol (E2), and estriol (E3). Another type of estrogen called estetrol (E4) is produced only during pregnancy. Quantitatively, estrogens circulate at lower levels than androgens in both men and women. While estrogen levels are significantly lower in males compared to females, estrogens nevertheless also have important physiological roles in males.
 Question: is there such a thing as natural estrogen Context: Black Card LLC is an American financial services company that offers the Black Card (MasterCard), a rewards credit card issued by Barclays Bank Delaware. As of 2015, the card has an annual membership fee of $495 for the account holder, and $195 for every additional authorized user on the account. In 2015, the Black Card was rebranded from Visa to a MasterCard.
 Question: is there such thing as a black card Context: A century after the 1871 Act, the Banking and Financial Dealings Act 1971, which currently regulates bank holidays in the UK, was passed. The majority of the current bank holidays were specified in the 1971 Act: however New Year's Day and May Day were not introduced throughout the whole of the UK until 1974 and 1978 respectively. The date of the August bank holiday was changed from the first Monday in August to the last Monday in August, and the Whitsun bank holiday (Whit Monday) was replaced by the Late Spring Bank Holiday, fixed as the last Monday in May. In 1978 the first Monday in May in the rest of the UK, and the final Monday of May in Scotland, were designated as bank holidays.
 Question: did august bank holiday used to be at the beginning of august
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Yes