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.

Q: Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius

A: charlemagne
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Q: Category: YOU GOTTA REPRESENT 
Clue: For over a century, a slender serving woman has symbolized this Baker's Brand product

A: chocolate
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Q: Category: GENERAL SCIENCE 
Clue: Pumice is a variety of this type of rock formed when lava cools

A:
igneous
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