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.
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Question: Category: INVENTIONS 
Clue: Josephine Cochrane's 1886 version of this consisted of a copper boiler, wire baskets & a pump

Answer: a dishwasher


Question: Category: THE MOVIES 
Clue: On May 6, 2000 the 2 writers of this 1997 movie joined a rally trying to get the janitors at Harvard a raise

Answer: good will hunting


Question: Category: U.S. SENATE HISTORY 
Clue: Of the 15 expulsions of senators in the Senate's 215-year history, 11 took place in this year

Answer:
1861