Complex sentence: Feeney began boxing as an amateur at the age of 14 under the tutelage of Christy Houze, at the Innisfree Boxing Club in Sligo, under who he won three Connacht titles and an All-Ireland title.
Split into simpler sentences: Feeney began boxing as an amateur at the age of 14 under the tutelage of Christy Houze, at the Innisfree Boxing Club in Sligo. Durong his time under Houze he won three Connacht titles and an All-Ireland title.