sentences:  Members of the executive board who are also members of the executive board of "Bertelsmann Management SE" can only represent the foundation in collaboration with a second board member who does not belong to the executive board of "Bertelsmann Management SE", which is the Bertelsmann Group's management unit.At present, the Bertelsmann Stiftung executive board consists of Aart De Geus (chairman), Liz Mohn (vice-chairwoman), Jörg Dräger and Brigitte Mohn.The executive board is advised and supervised by the Bertelsmann Stiftung board of trustees.