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: PRESIDENTIAL LIBRARIES 
Clue: Opened in 1971, his presidential library is the farthest south
answer:
lyndon johnson


question:
Category: HISTORIC JOURNALS 
Clue: On January 18, 1912 he arrived at a tent near the pole & found "a record of five Norwegians having been there"
answer:
robert f. scott


question:
Category: AMERICAN HISTORY 
Clue: Lincoln said it was "the central act of my administration & the greatest event of the 19th century"
answer:

the emancipation proclamation