Question: Which film has the director who is older than the other, Dig Your Grave Friend... Sabata'S Coming or The Glass Boat? 
Sentence (from "The Glass Boat"): The Glass Boat( French: Le bateau de verre, German: Das brennende Schiff) is a 1927 French- German silent film directed by Constantin J. David and Jacqueline Milliet and starring André Nox, Françoise Rosay and Eric Barclay.
Relevant evidence: Yes