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.

Category: EUROPEAN ARTISTS 
Clue: In 1891 he held an auction of his paintings to finance his move to Tahiti
paul gauguin

Category: SCIENCE & NATURE 
Clue: Locusts are short-horned or short-antennaed varieties of these
grasshoppers

Category: FOUNDERS 
Clue: In 1958 former high school principal Dr. Ethel Andrus founded this group, the AARP

american association of retired persons