Complex sentence: The Australian twenty dollar banknote was issued when the currency was changed from the Australian pound to the Australian dollar on the 14 february 1966, it replaced the £10 note which had the same red colouration.
Split into simpler sentences: The Australian twenty dollar banknote was issued when the currency was changed from the Australian pound to the Australian dollar on 14 February 1966. It replaced the £10 note which had the same red colouration.