Text: The traditional and most common support--material to which the paint is applied--for watercolor paintings is paper. Other supports include papyrus, bark papers, plastics, vellum, leather, fabric, wood and canvas. Watercolor paper is often made entirely or partially with cotton, which gives a good texture and minimizes distortion when wet. Watercolors are usually translucent, and appear luminous because the pigments are laid down in a pure form with few fillers obscuring the pigment colors. Watercolors can also be made opaque by adding Chinese white.

Question: is white color uses in opaque water color?
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Answer: yes

Text: The Atlantic Portuguese man o' war (Physalia physalis), also known as the man-of-war, is a marine hydrozoan of the family Physaliidae found in the Atlantic, Indian and Pacific Oceans. Its long tentacles deliver a painful sting, which is venomous and powerful enough to kill fish or (rarely) humans. Despite its appearance, the Portuguese man o' war is not a true jellyfish but a siphonophore, which is not actually a single multicellular organism (true jellyfish are single organisms), but a colonial organism made up of specialized individual animals (of the same species) called zooids or polyps. These polyps are attached to one another and physiologically integrated, to the extent that they cannot survive independently, creating a symbiotic relationship, requiring each polyp to work together and function like an individual animal.

Question: can you survive a man of war sting?
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Answer: yes

Text: In 2005, J.B. Custom began marketing a ''1892 Mares Leg Lever Action Pistol''. This pistol is a fully functional copy of Randall's weapon, available in a number of calibers. Since they are newly manufactured as pistols and sold subject to handgun regulations, rather than cut down rifles, they avoid legal difficulties. Like the original weapon, the J.B. Custom version has a 12-inch (30 cm) barrel, and an overall length of 24 inches (61 cm).

Question: is a mare's leg considered a pistol?
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Answer: yes

Text: To prevent contamination due to back pressure, many health regulatory regimes require an air gap or mechanical backflow prevention assembly between the delivery point of mains water and local storage or use. Where submerged mains inflow is permitted, a backflow prevention assembly is required, which protects the potable water system from contamination hazards. A check valve is a basic form of backflow prevention, but often more complex devices are required because check valves are not considered to be reliable, when compared to more sophisticated devices with redundancies and reduced-pressure zones.

Question: is a check valve the same as a backflow preventer?
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Answer:
yes