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: In the United States, the quantity of cigarettes in a pack must be at least 20. Certain brands, such as Export As, come in packs of 25. For many years, half-packs of 10 (or even 14) cigarettes were commonly available.
 Question: can you buy a half pack of cigarettes Context: Chroma key compositing, or chroma keying, is a visual effects/post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video -- particularly the newscasting, motion picture and videogame industries. A color range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen -- chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate the color used as the backing.
 Question: can you use any color for a green screen Context: The original Guardians of the Galaxy are a superhero team appearing in American comic books published by Marvel Comics. The Guardians first appear in Marvel Super-Heroes #18 (Jan. 1969).
 Question: was guardians of the galaxy a comic book Context: They are liquids used primarily as a topical antiseptic. They also have many industrial and household uses. The term ``rubbing alcohol'' has become a general non-specific term for either isopropyl alcohol (isopropanol) or ethyl alcohol (ethanol) rubbing-alcohol products.
 Question: is ethyl alcohol the same as rubbing alcohol Context: The groundhog (Marmota monax), also known as a woodchuck, is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. It was first scientifically described by Carl Linnaeus in 1758. The groundhog is also referred to as a chuck, wood-shock, groundpig, whistlepig, whistler, thickwood badger, Canada marmot, monax, moonack, weenusk, red monk and, among French Canadians in eastern Canada, siffleux. The name ``thickwood badger'' was given in the Northwest to distinguish the animal from the prairie badger. Monax was a Native American name of the woodchuck, which meant ``the digger''. Young groundhogs may be called chucklings. Other marmots, such as the yellow-bellied and hoary marmots, live in rocky and mountainous areas, but the groundhog is a lowland creature. It is found through much of the eastern United States across Canada and into Alaska
 Question: is a woodchuck and a groundhog the same
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