Complex sentence: Later he moved to RTÉ Radio 1, where he presented a weekly programme, "Conversations with Eamon Dunphy" until 2009, before returning to Newstalk, now broadcasting nationwide, only to leave again in 2011 with a bang.
Split into simpler sentences: Later he moved to RTÉ Radio 1, where he presented a weekly programme, "Conversations with Eamon Dunphy" until 2009. He then returned to Newstalk, now broadcasting nationwide, only to leave again in 2011 with a bang.