Complex sentence: The school opened on the Biltmore Estate grounds on September 1,1898, one month before Fernow's opening of the New York State College of Forestry at Cornell University.
Split into simpler sentences: The school opened on the Biltmore Estate grounds on September 1,1898. The Biltmore Forest School began operation one month before Fernow's opening of the New York State College of Forestry at Cornell University.