Complex sentence: Australia's musical traditions include the Irish folk songs of the convicts, pastoral poets of the 1880's and later influences from American cowboy songs and 50's rock' n' roll, and the bush ballads were influenced by and part of these forms.
Split into simpler sentences: Australia's musical traditions include the Irish folk songs of the convicts, pastoral poets of the 1880's. Later influences from American cowboy songs and 50's rock' n' roll, and the bush ballads were influenced by and part of these forms.