Complex sentence: The club's ethnic background is Polish Australian and the club was founded as the Polonia Adelaide Sports Club on 16 June 1950 by Alek Cmielewski and Karol Metanomski.
Split into simpler sentences: The club's ethnic background is Polish Australian and the club was founded as the Polonia Adelaide Sports Club. The Polonia Adelaide Sports Club was founded on 16 June 1950 by Alek Cmielewski and Karol Metanomski.