question: Michael Anderson and Derek Estlin Purvis are both what?
answer: film director
context: Title: The Wreck of the Mary Deare (film)
  Passage: The Wreck of the Mary Deare is a 1959 Metrocolor (in CinemaScope) British-American thriller film directed by Michael Anderson and starring Gary Cooper and Charlton Heston, and featuring Michael Redgrave, Cecil Parker, Richard Harris and John Le Mesurier.  The screenplay by Eric Ambler was based on the 1956 novel of the same name by Hammond Innes.
  Title: Derek Estlin Purvis
  Passage: Derek Estlin Purvis (born November 27, 1972) is an American film director, producer, executive producer, screenwriter, and entrepreneur.  He has financed, produced or directed 13 films of various genres.  He is a founder and creator of the Application Movie Pitch Pro.
  Title: Michael Anderson (director)
  Passage: Michael Joseph Anderson, Sr. (born 30 January 1920) is an English film director, best known for directing the Second World War film "The Dam Busters" (1955), the epic "Around the World in 80 Days" (1956) and the dystopian sci-fi film "Logan's Run" (1976).
citations: Derek Estlin Purvis Michael Anderson (director)