Answer the following question: Pratidwandi or Pratidandi (literally Adversary Opponent or Competitor in Bengali; known internationally as The Adversary) is a 1970 Indian Bengali drama filmdirected by Satyajit Ray based on the novel by Sunil Gangopadhyay. It is the first part of the Calcutta trilogy. Set during the period of the naxalite movement in Bengal Pratidwandi tells the story of Siddharta an educated middle-class man caught within the turmoils of social unrest. 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?
Answer:
Film