Complex sentence: Kilimanjaro International is managed by the state owned Kilimanjaro Airport Development Company, whilst airports in the semi-autonomous Zanzibar Archipelago are under the jurisdiction of the Zanzibar Airports Authority.
Split into simpler sentences: Kilimanjaro International is managed by the state owned Kilimanjaro Airport Development Company. Airports in the Zanzibar Archipelago are under the jurisdiction of the Zanzibar Airports Authority.