Complex sentence: On his father's side, the Bartók family was a Hungarian lower noble family, originating from Borsodszirák, Borsod county, although his father's mother was of a Roman Catholic Serbian family.
Split into simpler sentences: On his father's side, the Bartók family was a Hungarian lower noble family, originating from Borsodszirák, Borsod county. Although, his father's mother was of a Roman Catholic Serbian family.