Complex sentence: In 1425, with the death of Duke John III, the Straubing dukes became extinct in the male line, and his possessions were partitioned by the Dukes of Bavaria-Munich, Bavaria-Landshut and Bavaria-Ingolstadt only in 1429 under arbitration of the emperor.
Split into simpler sentences: In 1425, with the death of Duke John III, the Straubing dukes became extinct in the male line. His possessions were partitioned between the Dukes of Bavaria-Munich, Bavaria-Landshut and Bavaria-Ingolstadt in 1429 under arbitration of the emperor.