Complex sentence: Rosario Ortona later became the UMSL's leader and was its mayoral candidate in a 1984 by-election called after di Ciocco's unexpected death; he finished third against Raymond Renaud of the newly formed Ralliement de Saint-Léonard.
Split into simpler sentences: Rosario Ortona later became the UMSL's leader and was its mayoral candidate in a 1984 by-election called after di Ciocco's unexpected death. He finished third against Raymond Renaud of the newly formed Ralliement de Saint-Léonard.