Complex sentence: He was educated in Newry by Irish Christian Brothers at Abbey Christian Brothers Grammar School and at St Colman's College, Newry, and in 1914 he joined the Irish Volunteers and the Gaelic League.
Split into simpler sentences: He was educated in Newry by Irish Christian Brothers at Abbey Christian Brothers Grammar School and at St Colman's College, Newry. In 1914 he joined the Irish Volunteers and the Gaelic League.