Question: Mahanoy Creek is a 51.6 mi tributary of the Susquehanna River, in Northumberland and Schuylkill counties, Pennsylvania, a major river located in the northeastern region of which country?
Sentence (from "Mahanoy Creek"): Mahanoy Creek is a 51.6 mi tributary of the Susquehanna River in Northumberland and Schuylkill counties, Pennsylvania.
Relevant evidence: Yes