instruction:
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: AMERICAN LITERATURE
Clue: Controversial even when serialized in the "National Era", it sold over 300,000 copies in book form in 1852
answer:
uncle tom's cabin

question:
Category: HISTORIC ROYALTY
Clue: These two men seen here, allies during World War I, were sometimes mistaken for each other
answer:
czar nicholas ii & king george v

question:
Category: TV HISTORY
Clue: The 1979 sequel to this miniseries is set in Henning, Tennessee, beginning in 1882
answer:
roots