Complex sentence: Their father, Howard E. Winklevoss, was a professor of actuarial science at the Wharton School of the University of Pennsylvania, and author of "Pension Mathematics with Numerical Illustrations", as well as founder of Winklevoss Consultants and Winklevoss Technologies.
Split into simpler sentences: Their father, Howard E. Winklevoss, was a professor of actuarial science at the Wharton School of the University of Pennsylvania. He is author of "Pension Mathematics with Numerical Illustrations", and founder of Winklevoss Consultants and Winklevoss Technologies.