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.

Ex Input:
The event was first organized by Adolph Ochs, owner of The New York Times newspaper, as a successor to a series of New Year's Eve fireworks displays he held at the building to promote its status as the new headquarters of the Times, while the ball itself was designed by Artkraft Strauss. First held on December 31, 1907, to welcome 1908, the ball drop has been held annually since, except in 1942 and 1943 in observance of wartime blackouts.

Ex Output:
origin of the ball dropping in times square


Ex Input:
Osmosis (/ ɒzˈmoʊ. sɪs /) is the spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. It may also be used to describe a physical process in which any solvent moves across a semipermeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations. Osmosis can be made to do work.

Ex Output:
osmosis is the movement of water from an area of


Ex Input:
If two vectors have the same direction (or have the exact opposite direction from one another, i.e. are not linearly independent) or if either one has zero length, then their cross product is zero. More generally, the magnitude of the product equals the area of a parallelogram with the vectors for sides; in particular, the magnitude of the product of two perpendicular vectors is the product of their lengths. The cross product is anticommutative (i.e., a × b = − b × a (\ displaystyle \ mathbf (a) \ times \ mathbf (b) =-\ mathbf (b) \ times \ mathbf (a))) and is distributive over addition (i.e., a × (b + c) = a × b + a × c (\ displaystyle \ mathbf (a) \ times (\ mathbf (b) + \ mathbf (c)) = \ mathbf (a) \ times \ mathbf (b) + \ mathbf (a) \ times \ mathbf (c))). The space R 3 (\ displaystyle \ mathbb (R) ^ (3)) together with the cross product is an algebra over the real numbers, which is neither commutative nor associative, but is a Lie algebra with the cross product being the Lie bracket.

Ex Output:

when will the cross product of two vectors be zero