Complex sentence: In Hamburg on 31 July 1971, Andreas married with Carin Dabelstein; this marriage, apparently morganatic, was autorized by his father, and Andreas retain his place of heir-apparent of the Headship.
Split into simpler sentences: In Hamburg on 31 July 1971, Andreas married Carin Dabelstein. This marriage, apparently morganatic, was autorized by his father, and Andreas retained his place of heir-apparent of the Headship.