Complex sentence: He soon became acquainted with a young divorcee, and the pair began a three-month relationship, which ended after several unsuccessful attempts at intercourse, when the woman innocently asked her friends for advice as to how Chikatilo might overcome his inability to maintain an erection.
Split into simpler sentences: He soon became acquainted with a young divorcee, and the pair began a three-month relationship, which ended after several unsuccessful attempts at intercourse. The woman had innocently asked her friends for advice as to how Chikatilo might overcome his inability to maintain an erection.