Complex sentence: Anne Marie Simonsen was from Risør; her father, Niels Henrik Saxild Simonsen, was a tradesman and merchant ship-owner, and said to be the richest person in Risør.
Split into simpler sentences: Anne Marie Simonsen was from Risør and her father, Niels Henrik Saxild Simonsen, was a tradesman and merchant ship-owner. He was said to be the richest person in Risør.