Complex sentence: Parallel to this is the romance of Roland Graeme, a dim-witted but spirited youth, who after being brought up at the castle of Avenel is sent by the Regent Murray to be page to Mary Stuart with directions to guard her.
Split into simpler sentences: Parallel to this is the romance of Roland Graeme, a dim-witted but spirited youth. Roland is sent by the Regent Murray to be page to Mary Stuart with directions to guard her.