Complex sentence: The Australian club championship is a rugby union challenge match between the Brisbane and Sydney club premiers, played on a regular basis from 1982 to 1992 (inclusive) and since 2007, and on an ad-hoc basis in various other years.
Split into simpler sentences: The Australian club championship is a rugby union challenge match between the Brisbane and Sydney club premiers. The fixture was played on a regular basis from 1982 to 1992 (inclusive) and again since 2007, and also on an ad-hoc basis in various other years.