Complex sentence: During the IRA Border Campaign, he was captured training IRA members in Glencree in May 1956, served seven months in Mountjoy Prison and was then interned at the Curragh Camp.
Split into simpler sentences: During the IRA Border Campaign, he was captured while training other IRA members in Glencree in May 1956. He served seven months in Mountjoy Prison and was then interned at the Curragh Camp.