Question: What was the name of Patrick Bouvier Kennedy's younger brother, who was known as an American lawyer, journalist, magazine publlisher?
Sentence (from "Patrick Bouvier Kennedy"): Three months later, his death was eclipsed by his father's assassination, but eventually his short lifespan led to innovations in treatment of premature infants, which gave rise to the pediatric subspecialty neonatology.
Relevant evidence: No