What river is the city that Davor Bernardić was a leader of the SDP branch near?
Davor Bernardić:  He had previously served as the one of four SDP Vice-presidents, leader of the SDP's Zagreb branch and president of the SDP Youth Forum. Zagreb:  It is located in the northwest of the country, along the Sava river, at the southern slopes of the Medvednica mountain.
Sava