Complex sentence: Suntec City office towers compromise five buildings across Towers One to Five with four 45-storey and one 18-storey tower making up the five office towers at Suntec City.
Split into simpler sentences: Suntec City office towers compromises of five buildings across Towers One to Five with. Four 45-storey and one 18-storey tower make up the 5 office towers at Suntec City.