Complex sentence: O'Shaughnessy's father, John O'Shaughnessy, is an Emeritus Professor of the Columbia University Business School and his brother, Nicholas O'Shaughnessy, is Professor of Communications at Queen Mary College, London University.
Split into simpler sentences: O'Shaughnessy's father, John O'Shaughnessy, is an Emeritus Professor of the Columbia University Business School. His brother, Nicholas O'Shaughnessy, is Professor of Communications at Queen Mary College, London University.