Complex sentence: He starred opposite Lillian Gish in D.W. Griffith's "Broken Blossoms" (1919) and "Way Down East" (1920) and was among the founders of the Academy of Motion Picture Arts and Sciences in 1927.
Split into simpler sentences: He starred opposite Lillian Gish in D.W. Griffith's "Broken Blossoms" (1919) and "Way Down East" (1920). He was among the founders of the Academy of Motion Picture Arts and Sciences in 1927.