Complex sentence: His exploits are commemorated in the famous Irish ballad "Kelly of Killanne" written by Patrick Joseph McCall (1861-1919) who also wrote "Boolavogue" and "Follow me up to Carlow".
Split into simpler sentences: His exploits are commemorated in the famous Irish ballad "Kelly of Killanne" written by Patrick Joseph McCall (1861-1919). McCall also wrote the ballads "Boolavogue" and "Follow Me up to Carlow".