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: GEOLOGISTS 
Clue: In 1957 Sir Vivian Fuchs led the first crossing of this continent; it took 99 days
answer:
antarctica


question:
Category: RIVERS 
Clue: The mouth of this 2315-mile-long river lies in the Mississippi River 17 miles above St. Louis
answer:
the missouri


question:
Category: NAME THE JAMES 
Clue: ...who was convicted of assassinating Martin Luther King, Jr.
answer:

james earl ray