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.

Q: Category: HANNA-BARBERA DOGS 
Clue: In one episode of the original "Jetsons", a millionaire tried to take him away

A: astro
****
Q: Category: A NATION DIVIDED 
Clue: It was officially divided into North & South in 1953

A: korea
****
Q: Category: LAKES & RIVERS 
Clue: Even though it's the world's second longest river, it still has the world's largest drainage basin

A:
amazon
****