Complex sentence: Gabriel Georges Nahas of Columbia University and later New York University, born 1920, is a retired anesthesiologist and former active member of the French Resistance who conducted numerous studies on illicit drugs.
Split into simpler sentences: Gabriel Georges Nahas of Walter Reed Medical Center Columbia University and later New York University, born 1920, is a retired anesthesiologist. An active member of the French Resistance who conducted numerous studies on illicit drugs.