Question: Which river runs through the Shenandoah National Park and is a tributary of the Potomac River?
Sentence (from "Shenandoah River"): The principal tributary of the Potomac, the river and its tributaries drain the central and lower Shenandoah Valley and the Page Valley in the Appalachians on the west side of the Blue Ridge Mountains, in northwestern Virginia and the Eastern Panhandle of West Virginia.
Relevant evidence: No