 Complete the following phrase:  When the reformers, captured by the National Socialists, returned to the Kulturbund in 1939, they exerted strong pressure on President Johann Keks and Giljum, under whom they resigned from their posts in August 1939. Sepp Janko became the new president of the movement. Giljum took over the management of the German School Foundation in October 1939, which sought to expand the German school system in Yugoslavia. After the 