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: INVENTIONS 
Clue: Josephine Cochrane's 1886 version of this consisted of a copper boiler, wire baskets & a pump
[A]: a dishwasher


[Q]: Category: AMERICAN ARTISTS 
Clue: From 1919 to 1924, this artist taught art in the public schools of Cedar Rapids, Iowa
[A]: grant wood


[Q]: Category: TREES 
Clue: This type of tree that includes the pecan is common in the eastern U.S., is noted for toughness & can live to 300
[A]:
hickory