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 photic sneeze reflex (also known as, Autosomal Compelling Helio-Ophthalmic Outburst (ACHOO) and colloquially sun sneezing) is a condition that causes sneezing in response to numerous stimuli, such as looking at bright lights or periocular (surrounding the eyeball) injection. The condition affects 18-35% of the population in the United States, but its exact mechanism of action is not well understood.
 Question: can looking into the sun make you sneeze Context: New Zealand has permitted dual or multiple citizenship since the creation of New Zealand citizenship on 1 January 1949, although dual citizens who actively acquired or exercised their other citizenship could lose their New Zealand citizenship if their continued citizenship was judged ``not conducive to the public good''. The modern wording is similar; dual citizens may lose New Zealand citizenship by acting ``in a manner that is contrary to the interests of New Zealand''. A New Zealand citizen who holds another citizenship may renounce their New Zealand citizenship (see below), although this may not be registered if they reside in New Zealand or the country is at war.
 Question: can i have dual citizenship in new zealand Context: Mercury was a common, long-standing treatment for syphilis, and its use as such has been suggested to date back to The Canon of Medicine (1025) by the Persian physician Ibn Sina (Avicenna); although this is only possible if syphilis existed in the Old World prior to Columbus (see § Origin). One of the first supporters of mercury treatment was Paracelsus because it had positive effects on the Arabic treatment of leprosy, which was thought to be a disease related to syphilis. Giorgio Sommariva of Verona is recorded to have used mercury to treat syphilis in 1496, and is often recognized as the first physician to have done so, although he may not have been a physician. During the sixteenth century, mercury was administered to syphilitic patients in various ways, including by rubbing it on the skin, by applying a plaster, and by mouth. A ``Fumigation'' method of administering mercury was also used, in which mercury was vaporized over a fire and the patients were exposed to the resulting steam, either by being placed in a bottomless seat over the hot coals, or by having their entire bodies except for the head enclosed in a box (called a ``tabernacle'') that received the steam. The goal of mercury treatment was to cause the patient to salivate, which was thought to expel the disease. Unpleasant side effects of mercury treatment included gum ulcers and loose teeth. Mercury continued to be used in syphilis treatment for centuries; an 1869 article by TJ Walker discussed administering mercury by injection for this purpose.
 Question: was mercury used as a cure for syphilis
Yes
Yes
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Yes