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: MUSIC HISTORY 
Clue: In this building Ella Fitzgerald & Sarah Vaughan both won amateur talent contests, one in 1934 & the other in 1942
the apollo theater

Category: EUROPEAN PRINCESSES 
Clue: On July 20, 1999 she gave birth to her fourth child, Princess Alexandra of Hanover
princess caroline of monaco

Category: HISTORIC WOMEN 
Clue: In 1998 the director of the U.S. Mint called her "A woman of exemplary physical courage and stamina"

sacajawea