Passage: At the insistence of USPD representatives, the Council of People's Representatives appointed a "Nationalisation Committee" including Karl Kautsky, Rudolf Hilferding and Otto Hue, among others. This committee was to examine which industries were "fit" for nationalisation and to prepare the nationalisation of the coal and steel industry. It sat until 7 April 1919, without any tangible result. "Self-Administration Bodies" were installed only in coal and potash mining and in the steel industry. From these bodies emerged the modern German Works or Factory Committees. Socialist expropriations were not initiated.

Question: When did the Council of People's Respresentatives finally end?
7 April 1919