Question: The Aeolian Singers are based in the English county bordered by which county on its north?
Sentence (from "Popovo (župa)"): In the Middle Ages, the territory of the Popovo field by the Trebišnjica, the northern part of the Ljubinje area, and the southern part of Bobani, was part of the "župa" (county) of Popovo (] ) which was located in the Hum province.
Relevant evidence: No