Simplify the following text for a Grade 7 native English-speaking person.
Original: The Congo River ( also known as the Zaire River ) is the deepest river in the world , with measured depths in excess of 230 m. It is the second largest river in the world by volume of water discharged , though it has only one-fifth the volume of the world 's largest river , the Amazon .
Simplified: The Congo River ( also known as Zaire River ) is the largest river in Western Central Africa .