Complex sentence: The short ballet tells of deceased nuns rising from their tombs in a ruined cloister to seduce the knight, Robert le Diable, into accepting a talisman to win him a princess.
Split into simpler sentences: The short ballet tells of deceased nuns rising from their tombs in a ruined cloister. Their aim is to seduce the knight, Robert le Diable, into accepting a talisman to win him a princess.