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.
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Question: Category: WORLD GEOGRAPHY 
Clue: The name of this large port city on Western Europe's Schelde River literally means "at the wharf"

Answer: antwerp


Question: Category: LET'S GET MEDICAL 
Clue: Amyotrophic lateral sclerosis, also known as his disease, claimed his life in 1941

Answer: lou gehrig


Question: Category: TELEVISION HISTORY 
Clue: He was named to the CBS board of directors after he gave up his news anchor position to Dan Rather

Answer:
walter cronkite