Q:Whispering Smith (1948) is a Western film starring Alan Ladd as a railroad detective assigned to stop a gang of train robbers. The supporting cast includes Robert Preston and Brenda Marshall. The picture is based on a novel by Frank H. Spearman and a previous 1926 film adaptation starring H.B. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Film