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 consistency, answers should be in all lower cased letters.

Q: Category: THE WHITE HOUSE 
Clue: Among those who filled this post were Latisha Tyler Semple, Harriet Lane & Dolley Madison

A: first lady
****
Q: Category: NONFICTION 
Clue: This 1988 bestseller was subtitled "From the Big Bang to Black Holes"

A: a brief history of time
****
Q: Category: NATURE 
Clue: Grown on less than 1% of the land of the Netherlands, it's their living symbol

A:
tulip
****