The Night Digger is a 1971 British thriller film that was based on the novel Nest in a Fallen Tree by Joy Cowley. It was adapted by Roald Dahl and starred his wife Patricia Neal. The Night Digger was the American title; it was originally released in the United Kingdom as The Road Builder. 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