Complex sentence: The series' hero, the 13-year-old biological son of Renton Thurston and Eureka who one day fell from a clear sky into a bay in Iwato Jima, before giving birth to Ao sometime later.
Split into simpler sentences: The series' hero, the 13-year-old biological son of Renton Thurston and Eureka. His mother one day fell from a clear sky into a bay in Iwato Jima, before giving birth to Ao sometime later.