Individual #East_USA  the region of the United States lying north of the Ohio River and east of the Mississippi River
  instance of:  geographical_area
  part of:  USA
  part:  Southeast_USA  the southeastern region of the United States
  part:  Northeast_USA  the northeastern region of the United States
  part:  Alleghenies__Allegheny_Mountains  the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia
  part:  Appalachians__Appalachian_Mountains  a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico; a historic barrier to early westward expansion of the United States
     part:  Appalachia  an impoverished coal mining area in the Appalachian Mountains (from Pennsylvania to North Carolina)
     part:  Alleghenies__Allegheny_Mountains  the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia
     part:  Blue_Ridge_Mountains__Blue_Ridge  a range of the Appalachians extending from Pennsylvania to northern Georgia
     part:  Catskills__Catskill_Mountains  a range of the Appalachians west of the Hudson in southeastern New York; includes many popular resort areas
     part:  Cumberland_Mountains__Cumberland_Plateau  the southwestern part of the Appalachians
        part:  Cumberland_Gap  a pass through the Cumberland Mountains between Virginia and Kentucky that early settlers used in order to move west
     part:  Great_Smoky_Mountains  part of the Appalachians between North Carolina and Tennessee
  part:  Potomac_River__Potomac  a river in the east central United States; rises in the Appalachian Mountains of West Virginia and flows eastward to the Chesapeake Bay

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