Question: Which film has the director who is older than the other, Calling Bulldog Drummond or Convoy (1978 Film)? 
Sentence (from "Convoy (1978 film)"): Convoy is a 1978 action film directed by Sam Peckinpah and starring Kris Kristofferson, Ali MacGraw, Ernest Borgnine, Burt Young, Madge Sinclair and Franklyn Ajaye.
Relevant evidence: Yes