Complex sentence: Annabeth Chase, Leo Valdez, Piper McLean, and Percy Jackson as well as three Roman demigods, who are Jason Grace, Hazel Levesque, and Frank Zhang.
Split into simpler sentences: Annabeth Chase, Leo Valdez, Piper McLean, and Percy Jackson. Also includes a few Roman demigods, who are Jason Grace, Hazel Levesque, and Frank Zhang.