Question: Sam Nelson was a director and assistant director who worked from the end of the silent era right up through the early 1960s, as an assistant director he worked on such notable films as, And Then There Were None, released in which year, a film adaptation of Agatha Christie's best-selling mystery novel of the same name, directed by René Clair?
Sentence (from "René Clair"): He went on to make some of the most innovative early sound films in France, before going abroad to work in the UK and USA for more than a decade.
Relevant evidence: No