Complex sentence: The Fleadh was held in Derry in 2013, the first time that it will be held in Northern Ireland, the primary reason for holding the Fleadh in Derry was due to that city being awarded the UK City of Culture for 2013.
Split into simpler sentences: The Fleadh was held in Derry in 2013, the first time that it was held in Northern Ireland. One of the primary reasons for holding the Fleadh in Derry was due to that city being awarded the UK City of Culture for 2013.