Complex sentence: Lewis Yealland appears in Pat Barker's "Regeneration", however he is portrayed unsympathetically, treating a shell-shocked man suffering from hysterical mutism using electric shock treatment showing no compassion for his patient.
Split into simpler sentences: Lewis Yealland appears in Pat Barker's "Regeneration". However, he is portrayed unsympathetically, treating a shell-shocked man suffering from hysterical mutism using electric shock treatment and showing no compassion for his patient.