Complex sentence: The Australian Convicts are a touring amateur side of Australian rules football players and officials from Australia, that were formed by Brian Clarke in 2003 to help promote Australian rules football internationally through playing tour matches against international amateur sides.
Split into simpler sentences: The Australian Convicts are a touring amateur side of Australian rules football players and officials from Australia. The concept of the side was formed by Brian Clarke in 2003 to help promote Australian rules football internationally through playing tour matches against international amateur sides.