Serbia–Bulgaria border

Target entity: Serbia–Bulgaria border
Context triple: [Midžor, isOnInternationalBorder, Serbia–Bulgaria border]

• A. North Macedonia–Bulgaria border
  The North Macedonia–Bulgaria border is an international boundary in the Balkans that runs largely through mountainous terrain and separates the Republic of North Macedonia from Bulgaria.
• B. Bulgaria–Greece border
  The Bulgaria–Greece border is an international land boundary in Southeast Europe that runs largely through mountainous terrain, including the Rhodope range, separating Bulgaria to the north from Greece to the south.
• C. Albania–North Macedonia border
  The Albania–North Macedonia border is an international boundary in the Balkans that runs through rugged mountainous terrain, including the peak of Mount Korab, and separates the Republic of Albania from the Republic of North Macedonia.
• D. Greek–Albanian border
  The Greek–Albanian border is an international boundary in the Balkans separating Greece and Albania, running through mountainous terrain and historically significant regions.
• E. Yugoslavia–Italy border
  The Yugoslavia–Italy border was a Cold War-era frontier in the northern Adriatic region that formed part of the geopolitical divide between the communist Eastern Bloc and Western Europe.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Serbia–Bulgaria border
Target entity description: The Serbia–Bulgaria border is an international boundary in Southeast Europe separating the Republic of Serbia from the Republic of Bulgaria, running across mountainous terrain including parts of the Balkan Mountains.

• A. North Macedonia–Bulgaria border
  The North Macedonia–Bulgaria border is an international boundary in the Balkans that runs largely through mountainous terrain and separates the Republic of North Macedonia from Bulgaria.
• B. Bulgaria–Greece border
  The Bulgaria–Greece border is an international land boundary in Southeast Europe that runs largely through mountainous terrain, including the Rhodope range, separating Bulgaria to the north from Greece to the south.
• C. Albania–North Macedonia border
  The Albania–North Macedonia border is an international boundary in the Balkans that runs through rugged mountainous terrain, including the peak of Mount Korab, and separates the Republic of Albania from the Republic of North Macedonia.
• D. Greek–Albanian border
  The Greek–Albanian border is an international boundary in the Balkans separating Greece and Albania, running through mountainous terrain and historically significant regions.
• E. Yugoslavia–Italy border
  The Yugoslavia–Italy border was a Cold War-era frontier in the northern Adriatic region that formed part of the geopolitical divide between the communist Eastern Bloc and Western Europe.
• F. None of above. chosen