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Which West African river is about 4,200 km long and empties into the Gulf of Guinea?
Answer
Niger
Which Canadian river system is ranked 13th by length and empties into the Beaufort Sea?
Answer
Mackenzie
Which Southeast Asian river is listed 12th by length and reaches the South China Sea?
Answer
Mekong
Which river system includes the Argun River and flows to the Sea of Okhotsk?
Answer
Amur
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Which river system is listed eighth by length and includes the Paraná River?
Answer
Río de la Plata
Which Chinese river is about 5,464 km long and is also called Huang He?
Answer
Yellow River
Which top-five river system includes the Missouri and Jefferson rivers?
Answer
Mississippi
Into which body of water does the Volga River flow?
Answer
Caspian Sea