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 "Dig Your Grave Friend... Sabata's Coming"): Sabata's Coming is a 1971 Spanish western film directed by Juan Bosch and starring by Richard Harrison, Fernando Sancho and Raf Baldassarre.
Relevant evidence: Yes