You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

[Q]: Category: IT'S NOT SO 
Clue: Though 4,500 miles long, it's not visible from space, as its materials are similar in color to the surrounding soil
[A]: the great wall of china


[Q]: Category: HOLLYWOOD 
Clue: The man seen here didn't wear an undershirt in this 1934 film, setting a trend for decades
[A]: it happened one night


[Q]: Category: ALL OF ME 
Clue: Scoliosis affects the spine; scleritis affects the sclera, found in this body part
[A]:
the eye