Complex sentence: He was influenced by his father who was a hypnotist and chiefly tought hypnosis to medical doctors and dentists for pain relief and removal of emotional based conditions like allergies, stuttering and obesity.
Split into simpler sentences: He was influenced by his father who was a hypnotist. He chiefly thought hypnosis to medical doctors and dentists for pain relief and removal of emotional based conditions like allergies, stuttering and obesity.