Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. How Green Was My Valley (film) -  How Green Was My Valley is a 1941 drama film directed by John Ford. The film based on the 1939 Richard Llewellyn novel was produced by Darryl F. Zanuck and scripted by Philip Dunne. The film features Walter Pidgeon Maureen O'Hara Anna Lee Donald Crisp and Roddy McDowall.
The answer to this question is:
Film