Complex sentence: Its territory consists of the three Zamboanga provinces and Zamboanga City, and the boundary between the peninsula and mainland is artificially marked by the border between the provinces of Zamboanga del Sur and Lanao del Norte.
Split into simpler sentences: Its territory consists of the three Zamboanga provinces and Zamboanga City. The boundary between the peninsula and the mainland is artificially marked by the border between the provinces of Zamboanga del Sur and Lanao del Norte.