Complex sentence: A Contribution to the Etiology of Birthmarks and Birth Defects (1997), which reported 200 cases of birthmarks that he believed corresponded with a wound on the deceased person whose life the child purported to recall.
Split into simpler sentences: A Contribution to the Etiology of Birthmarks and Birth Defects (1997). This reported 200 cases of birthmarks that, he believed, corresponded with a wound on the deceased person whose life the child purported to recall.