Josef Matthias Hauer (March 19, 1883 – September 22, 1959) was an Austrian composer and music theorist. He is most famous for developing, independent of and a year or two before Arnold Schoenberg, a method for composing with all 12 notes of the chromatic scale. Hauer was also an important early theorist of twelve-tone music and composition.

Can we draw the following conclusion?
Josef Hauer was a composer of many music and compositions most a year or two before Schoenberg. 

pick from the following.
[1]. Yes.
[2]. It's impossible to say.
[3]. No.
[2].