Complex sentence: Identified by methenamine silver stain of lung tissue, type I pneumocytes, and type II pneumocytes over-replicate and damage alveolar epithelium, causing death by asphyxiation.
Split into simpler sentences: Identified by methenamine silver stain of lung tissue. Type I pneumocytes, and Type II pneumocytes overreplicate and damage alveolar epithelium, causing death by asphyxiation.