Question: Which film has the director who is older than the other, Proof (1991 Film) or Private Worlds? 
Sentence (from "Gregory La Cava"): Gregory La Cava( March 10, 1892 – March 1, 1952) was an American film director of Italian descent best known for his films of the 1930s, including" My Man Godfrey" and" Stage Door", which earned him nominations for Academy Award for Best Director.
Relevant evidence: Yes