Complex sentence: Some local areas containing such activities districts have ambiguous titles that actually use the word city either as or in their title, for instance for a long time the central locality of Brisbane and Canberra are officially simply "City".
Split into simpler sentences: Some local areas containing such activities districts have ambiguous titles that actually use the word city either as or in their title. For instance for a long time the central localities of Brisbane and Canberra were officially simply "City".