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.

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
the great wall of china

Category: WARNER BROS. 
Clue: You can tour the Warner Bros. lot online, or in person in this San Fernando Valley city
burbank

Category: SOCKS AND THE CITY 
Clue: This brand of men's dress socks, seen here, has headquarters in Burlington, North Carolina

gold toe