Complex sentence: Arnold Schoenberg or Schönberg (13 September 187413 July 1951) was an Austrian composer and painter, associated with the expressionist movement in German poetry and art, and leader of the Second Viennese School.
Split into simpler sentences: Arnold Schoenberg or Schönberg (13 September 187413 July 1951) was an Austrian composer and painter. He was associated with the expressionist movement in German poetry and art, and leader of the Second Viennese School.