Complex sentence: Brigham's nephew, Robert Breck Brigham (1826-1900), was also a successful restaurateur and businessman who followed in his uncle's footsteps by endowing the Robert Breck Brigham Hospital to serve patients with arthritis and other debilitating joint diseases.
Split into simpler sentences: Brigham's nephew, Robert Breck Brigham (1826-1900), was also a restaurateur and successful businessman. He followed in his uncle's example by endowing the Robert Breck Brigham Hospital to serve patients with arthritis and other debilitating joint diseases.