Complex sentence: Bowman is author of "De Valera and the Ulster Question 1917--1973" (1982) and was also the President of the Irish Association for Cultural, Economic and Social Relations in 1993 and Comhar, an environmental pressure group, from 1999 until 2004.
Split into simpler sentences: Bowman is author of "De Valera and the Ulster Question 1917--1973" (1982). Bowman was President of the Irish Association for Cultural, Economic and Social Relations in 1993 and of Comhar, an environmental pressure group, from 1999 until 2004.