sentences:  She suggested that the RTL and VOX television stations belonging to the Bertelsmann Group and numerous Gruner + Jahr magazines served the foundation by disseminating its messages.The sociologist and entrepreneur Frank Adloff has argued that it is indefensible that the foundation does not need to justify the use of its funds before any parliament or oversight authority.In the United States, he noted, non-profit foundations are not permitted to hold more than a 20% stake in a company in order to avoid possible conflicts of interest; in addition, they have to provide a public accounting of their expenditures.