Complex sentence: The Royal Irish Regiment (27th (Inniskilling) 83rd and 87th and Ulster Defence Regiment) (R IRISH) is an infantry unit of the British Army and is the only remaining Irish regiment of the line.
Split into simpler sentences: The Royal Irish Regiment (27th (Inniskilling) 83rd and 87th and Ulster Defence Regiment) (R IRISH) is an infantry unit of the British Army. It is the only remaining Irish regiment of the line.