Question: What river is the city that Davor Bernardić was a leader of the SDP branch near?
Sentence (from "Rupel Pass"): The Rupel Gorge or Rupel Pass (Greek: Στενωπό του Ρούπελ ; Bulgarian: Рупелски пролом ) is a steep river valley in the northern part of Central Macedonia, immediately south of the Greek-Bulgarian border.
Relevant evidence: No