Question: Which film has the director who is older than the other, Lightning Speed or He Knows You'Re Alone? 
Sentence (from "Robert North Bradbury"): Robert N. Bradbury( March 23, 1886 – November 24, 1949)( born Ronald E. Bradbury) was an American film director and screenwriter who directed 125 movies between 1918 and 1941.
Relevant evidence: Yes