Complex sentence: In 1905 John F. Ryan founded the Jockey Club of Montreal, and on June 4,1907 the Club opened the new Blue Bonnets Raceway on Decarie Boulevard.
Split into simpler sentences: In 1905 John F. Ryan founded the Jockey Club of Montreal. In 1907, on June 4th, the Club opened the new Blue Bonnets Raceway on Decarie Boulevard.