Complex sentence: The river starts in Oton at Batiano River, which is also an estuary, then traverses the Iloilo City districts of Lapuz, Lapaz, Mandurriao, Molo, Arevalo and the city proper, before emptying into the Iloilo Strait.
Split into simpler sentences: The river starts in Oton at Batiano River, which is also an estuary. It then traverses the Iloilo City districts of Lapuz, Lapaz, Mandurriao, Molo, Arevalo and the city proper, before emptying into the Iloilo Strait.