Complex sentence: The Questing Beast, or the Beast Glatisant (Barking Beast), is a monster from Arthurian legend, the subject of quests by famous knights like King Pellinore, Sir Palamedes, and Sir Percival.
Split into simpler sentences: The Questing Beast, or the Beast Glatisant (Barking Beast), is a monster from Arthurian legend. It is the subject of quests undertaken by famous knights such as King Pellinore, Sir Palamedes, and Sir Percival.