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.

Input: Consider Input: Category: SCIENCE GRAB BAG
Clue: A material called URhGe can be manipulated into being this, lacking electrical resistance

Output: superconductors

Input: Consider Input: 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

Output: the great wall of china

Input: Consider Input: Category: IT'S GONNA BLOW!
Clue: A thin membrane helps this instrument produce its distinctive sound
Output: kazoo