Complex sentence: O'Reilly was born, the eldest of triplets, and fourth of six children, in 1966, in Dublin, and brought up in Dublin and Kilcullen, Ireland and Fox Chapel, Pittsburgh, USA.
Split into simpler sentences: O'Reilly was born, the eldest of triplets, and fourth of six children, in 1966, in Dublin. He was brought up in Dublin and Kilcullen, Ireland and Fox Chapel, Pittsburgh, USA.