Potomac Heritage Trail
The Potomac Heritage Trail , also known as the Potomac Heritage National Scenic Trail or the PHT , is a designated National Scenic Trail corridor spanning parts of the mid-Atlantic and upper southeastern regions of the United States that will connect various trails and historic sites in the states of Virginia , Maryland , and Pennsylvania and the District of Columbia . 
<triplet> Potomac Heritage Trail <subj> United States <obj> country <triplet> National Scenic Trail <subj> United States <obj> country <triplet> United States <subj> Virginia <obj> contains administrative territorial entity <triplet> Virginia <subj> United States <obj> country <triplet> Maryland <subj> United States <obj> located in the administrative territorial entity <triplet> Pennsylvania <subj> United States <obj> country <triplet> District of Columbia <subj> United States <obj> country