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: External Compression Headache is caused by any type of headwear. This includes headwear that places pressure on the head -- including tight hats, helmets, headbands, headphones and goggles. It is not known why some people are more sensitive than others to this type of pressure. External compression headaches can affect anyone who uses headwear. The headaches are more common among people who have migraines. It is believed to affect about four percent of the population. It is also referred to as ``swim goggle headache''.
 Question: can a tight hat give you a headache Context: During the last years of the Wanli era and those of his two successors, an economic crisis developed that was centered on a sudden widespread lack of the empire's chief medium of exchange: silver. The Portuguese first established trade with China in 1516, trading Japanese silver for Chinese silk, and after some initial hostilities gained consent from the Ming court in 1557 to settle Macau as their permanent trade base in China. Their role in providing silver was gradually surpassed by the Spanish, while even the Dutch challenged them for control of this trade. Philip IV of Spain (reigned 1621--1665) began cracking down on illegal smuggling of silver from New Spain and Peru across the Pacific through the Philippines towards China, in favor of shipping American-mined silver through Spanish ports. In 1639 the new Tokugawa regime of Japan shut down most of its foreign trade with European powers, cutting off another source of silver coming into China. These events occurring at roughly the same time caused a dramatic spike in the value of silver and made paying taxes nearly impossible for most provinces. People began hoarding precious silver as there was progressively less of it, forcing the ratio of the value of copper to silver into a steep decline. In the 1630s a string of one thousand copper coins equaled an ounce of silver; by 1640 that sum could fetch half an ounce; and, by 1643 only one-third of an ounce. For peasants this meant economic disaster, since they paid taxes in silver while conducting local trade and crop sales in copper.
 Question: did the influx of silver into china change the lives of peasants Context: Although airsoft guns in the United States are generally sold with a 0.24in. or longer orange tip on the barrel in order to distinguish them from real firearms, this is not required by federal law. Manufacturers and importers may cite Part 272 of Title 15 of the Code of Federal Regulations on foreign commerce and trade (15 CFR 272), which stipulates that ``no person shall manufacture, enter into commerce, ship, transport, or receive any toy, look-alike, or imitation firearm'' without approved markings; these may include an orange tip, orange barrel plug, brightly colored exterior of the whole toy, or transparent construction. However these restrictions do not apply to ``traditional B-B, paint-ball, or pellet-firing air guns that expel a projectile through the force of compressed air, compressed gas, or mechanical spring action, or any combination thereof.'' This language exempts airsoft guns from these requirements, placing them in the same category as bb-guns, pellet, air, and paintball, none of which are conventionally sold or used with an orange tip, and many of which bear as much resemblance to real firearms as airsoft guns do.
 Question: are bb guns required to have an orange tip
Yes
Yes
Yes
No