Complex sentence: He commenced his plastic arts education at the School of Fine Arts in Warsaw in the year 1904, where at the first he had his tuition under Stanisław Lentz and Karol Tichy.
Split into simpler sentences: He commenced his plastic arts education at the School od Fine Arts in Warsaw. In the Lear 1904, where at the first he had his tuition under Stanisław Lentz and Karol Tichy.