Complex sentence: William Geoffrey Cahill was born 7 November 1854 in Strokestown, Roscommon, Ireland at at Strokestown National School trained and served in the Royal Irish Constabulary.
Split into simpler sentences: William Geoffrey Cahill was born 7 November 1854 in Strokestown, Roscommon, Ireland. He studied at Strokestown National School and served in the Royal Irish Constabulary.