Sentence 1: The Pastaza River ( formerly known as Sumatara ) is a large tributary of the Marañón River in the northwestern Amazon - South American basin .
Sentence 2: The Pastaza River ( formerly known as the Sumatara ) is a large tributary to the Marañón River in the northwestern Amazon Basin of South America .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?