Complex sentence: In 2013, O'Reilly auditioned for a part in the RTE crime drama, Love/Hate, and secured the role of Detective Ciaran Madden.
Split into simpler sentences: In 2013, O'Reilly auditioned for the RTE crime drama, Love/Hate. O'Reilly was successful in these auditions and was selected to play the role of Detective Ciaran Madden.