sentences:  Kurt Biedenkopf was elected as the first chairman of the advisory board in 1987, and Reinhard Mohn himself took over this position in 1990.Horst Teltschik then joined the foundation, a development that received a great deal of media attention.The former foreign policy adviser to Helmut Kohl became managing director of the Bertelsmann Stiftung in early 1991 and began focusing on the foundation's internationalization.