Complex sentence: As the Supreme Council was unable to come to an agreement on the partition of the Upper Silesian territory on the lines of the plebiscite, a solution was found by turning the question over to the Council of the League of Nations.
Split into simpler sentences: As the Supreme Council was unable to come to an agreement on the partition of the Upper Silesian territory on the lines of the plebiscite. A solution was found by turning the question over to the Council of the League of Nations.