Complex sentence: Tony Fenton (25 March 1961--12 March 2015) was an Irish radio presenter and DJ. He worked with Today FM since 2004, having previously presented shows for 18 years on RTÉ 2fm, which he left in 2003.
Split into simpler sentences: Tony Fenton (25 March 1961--12 March 2015), was an Irish radio presenter and DJ, works with Today FM. He has been with Today FM since 2004, having previously presented shows for 18 years on RTÉ 2fm, which he left in 2003.