Question: Which film has the director who is older than the other, The Citadel Of Silence or Light Blast? 
Sentence (from "Marcel L'Herbier"): Marcel L'Herbier( 23 April 1888 – 26 November 1979) was a French filmmaker who achieved prominence as an avant- garde theorist and imaginative practitioner with a series of silent films in the 1920s.
Relevant evidence: Yes