District of Columbia–Maryland border

Target entity: District of Columbia–Maryland border
Context triple: [Anacostia River, crosses, District of Columbia–Maryland border]

• A. Maryland–West Virginia boundary (traditional)
  The Maryland–West Virginia boundary (traditional) is the historic state line in the central Appalachian region whose course was long defined by early colonial surveys and landmarks such as the Fairfax Stone.
• B. Virginia–West Virginia boundary
  The Virginia–West Virginia boundary is the state line that separates Virginia from its northwestern neighbor West Virginia, following a historically contested course through the Appalachian region.
• C. Southeast Washington, D.C.
  Southeast Washington, D.C. is a quadrant of the U.S. capital city known for its historic neighborhoods, including Capitol Hill, as well as major federal landmarks and rapidly redeveloping residential and commercial areas.
• D. Mason–Dixon Line
  The Mason–Dixon Line is the historic boundary surveyed in the 18th century between several American colonies that later came to symbolize the cultural and political divide between the Northern and Southern United States.
• E. Fort Washington, Maryland
  Fort Washington, Maryland is a suburban community in the Washington, D.C. metropolitan area known for its historic fort, residential neighborhoods, and location along the Potomac River.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: District of Columbia–Maryland border
Target entity description: The District of Columbia–Maryland border is the boundary line separating Washington, D.C. from the state of Maryland, running through both urban and natural areas in the region.

• A. Maryland–West Virginia boundary (traditional)
  The Maryland–West Virginia boundary (traditional) is the historic state line in the central Appalachian region whose course was long defined by early colonial surveys and landmarks such as the Fairfax Stone.
• B. Virginia–West Virginia boundary
  The Virginia–West Virginia boundary is the state line that separates Virginia from its northwestern neighbor West Virginia, following a historically contested course through the Appalachian region.
• C. Southeast Washington, D.C.
  Southeast Washington, D.C. is a quadrant of the U.S. capital city known for its historic neighborhoods, including Capitol Hill, as well as major federal landmarks and rapidly redeveloping residential and commercial areas.
• D. Mason–Dixon Line
  The Mason–Dixon Line is the historic boundary surveyed in the 18th century between several American colonies that later came to symbolize the cultural and political divide between the Northern and Southern United States.
• E. Fort Washington, Maryland
  Fort Washington, Maryland is a suburban community in the Washington, D.C. metropolitan area known for its historic fort, residential neighborhoods, and location along the Potomac River.
• F. None of above. chosen