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: ON THE GO 
Clue: John Ericsson, who built a steam locomotive in England in 1829, built this famous Civil War steam-powered ship

Answer: the monitor


Question: Category: ANTARCTICA 
Clue: A research base at the South Pole is co-named for these 2 explorers, the first 2 to reach it

Answer: amundsen


Question: Category: U.S. PRESIDENTS 
Clue: He was the first California native to become vice president & the first to become president

Answer:
richard nixon