Complex sentence: However, the king once again came under the control of a dominant figure, this time one harder to replace than Suffolk or Somerset: for the rest of his reign, it would be the queen, Margaret of Anjou, who would control the king.
Split into simpler sentences: However, the king once again became under the control of a dominant figure, this time one harder to replace than Suffolk or Somerset. For the rest of his reign, it would be the queen, Margaret of Anjou, who would control the king.