Complex sentence: Alexandra Health System comprises Khoo Teck Puat Hospital and Yishun Community Hospital, as well as Admiralty Medical Centre, Sembawang Primary Care Centre, and Woodlands Integrated Health Campus, which will be operational progressively from 2017 to 2022.
Split into simpler sentences: Alexandra Health System currently comprises Khoo Teck Puat Hospital and Yishun Community Hospital. Three more institutions, Admiralty Medical Centre, Sembawang Primary Care Centre, and Woodlands Integrated Health Campus will be operational progressively from 2017 to 2022.