Complex sentence: Douglas Fairbanks, Jr. hired Genn as a technical advisor on the movie, "Accused" (1936) and he was subsequently given a small part in the picture on the strength of a "splendid voice and presence".
Split into simpler sentences: Douglas Fairbanks, Jr. hired Genn as a technical advisor on the movie "Accused" (1936). He was subsequently given a small part in the picture on the strength of a "splendid voice and presence".