Complex sentence: Except for Southeast Limburgish, Modern Limburgish descends from some of the dialects that formed the offspring of Old Low Franconian in the Early Middle Ages, its history being at least as long as that of other Low Franconian dialects of which some eventually yielded Standard Dutch.
Split into simpler sentences: Except for Southeast Limburgish, Modern Limburgish descends from the dialects that formed the offspring of Old Low Franconian in the Early Middle Ages. The history of Limburgish is at least as long as that of other Low Franconian dialects, of which some eventually yielded standard Dutch.