In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Q: Lunar distance (LD or Δ ⊕ L (\ textstyle \ Delta _ (\ oplus L))), also called Earth -- Moon distance, Earth -- Moon characteristic distance, or distance to the Moon, is a unit of measure in astronomy. It is the average distance from the center of Earth to the center of the Moon. More technically, it is the mean semi-major axis of the geocentric lunar orbit. It may also refer to the time-averaged distance between the centers of the Earth and the Moon, or less commonly, the instantaneous Earth -- Moon distance. The lunar distance is approximately a quarter of a million miles.

A: what is the distance between earth and moon
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Q: 'The New Colossus' is a sonnet that American poet Emma Lazarus (1849 -- 1887) wrote in 1883 to raise money for the construction of a pedestal for the Statue of Liberty. In 1903, the poem was cast onto a bronze plaque and mounted inside the pedestal's lower level.

A: what is the poem on the statue of liberty
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Q: Green sand is an aggregate of sand, bentonite clay, pulverized coal and water. Its principal use is in making molds for metal casting. The largest portion of the aggregate is always sand, which can be either silica. There are many recipes for the proportion of clay, but they all strike different balances between moldability, surface finish, and ability of the hot molten metal to degas. The coal, typically referred to in as sea-coal, which is present at a ratio of less than 5%, partially combusts in the surface of the molten metal leading to offgassing of organic vapors.

A:
what are the main constituents of moulding sand
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