Complex sentence: Taslitzky started lecturing at the École Nationale Supérieure des Arts Décoratifs, became Secretary General of "the Union des arts plastiques" and the same year, was awarded the Blumenthal Prize for painting.
Split into simpler sentences: Taslitzky started lecturing at the École Nationale Supérieure des Arts Décoratifs, became Secretary General of the Union des arts plastiques. In the same year, he was awarded the Blumenthal Prize for painting.