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: U.S. RIVERS 
Clue: The Falls of Saint Anthony stop this mighty river from being navigable north of St. Paul, Minnesota

Answer: the mississippi


Question: Category: PLAYWRIGHTS 
Clue: In 1979 this author of "Streamers" married Jill Clayburgh

Answer: david rabe


Question: Category: FLYBOYS 
Clue: In 1922 this "Lone Eagle" learned to fly at a Lincoln, Nebraska flying school

Answer:
charles lindbergh