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.
--------
Question: Category: THE YOU-NIVERSE 
Clue: Containing 33 vertebrae, it's also known as the vertebral column

Answer: the spine


Question: Category: NATIVE AMER. WOMEN 
Clue: Even after their marriage ended, this Osage Indian was still Balanchine's Sugar Plum Fairy

Answer: tallchief


Question: Category: NOTABLE NAMES 
Clue: In 1932 Chou En-Lai succeeded this man as political commissar of the Red Army

Answer:
mao tse-tung