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 simplicity, answers should be in all lower cased letters.

Ex Input:
Category: EARLY ART 
Clue: This art form of setting stones or glass into mortar was the main decorative art of the Byzantine Empire

Ex Output:
mosaic


Ex Input:
Category: WORD 
Clue: The word spider comes from an Old English form of this verb, referring to its web-weaving

Ex Output:
spin


Ex Input:
Category: CARBON 
Clue: Plant products called alkaloids contain carbon & this element, the next one up on the periodic table

Ex Output:

nitrogen