Complex sentence: In Rochester, New York in 1924, he conducted his "Symphony No.1", and this brought him to the attention of George Eastman, inventor of the Kodak camera and roll film, who chose Hanson to be director of the Eastman School of Music.
Split into simpler sentences: In Rochester, New York in 1924, he conducted his "Symphony No.1". This performance brought him to the attention of George Eastman, who chose Hanson to be director of the Eastman School of Music.