question: Casey Jr is the train seen in a film released by who?
answer: RKO Radio Pictures
context: Title: Samuel B. Casey Jr.
  Passage: Samuel Brown Casey Jr., (October 4, 1927 – October 12, 2006) was president of Pullman Company in the 1970s, leading the company through a series of company operation unit spin-offs.
  Title: Boys in the Sand
  Passage: Boys in the Sand is a landmark American gay pornographic film released at the very beginnings of the Golden Age of Porn.  The 1971 film was directed by Wakefield Poole and stars Casey Donovan.  "Boys in the Sand" was the first gay porn film to include credits, to achieve crossover success, to be reviewed by "Variety", and one of the earliest porn films, after 1969's "Blue Movie" by Andy Warhol, to gain mainstream credibility, preceding 1972's "Deep Throat" by nearly a year.
  Title: Casey Jr. Splash 'n' Soak Station
  Passage: The Casey Jr.  Splash 'n' Soak Station is an attraction in the Fantasyland section of Walt Disney World in Bay Lake, Florida.  Casey Jr is the train seen in the film "Dumbo", where Dumbo, his mother, Mrs. Jumbo, and other circus animals travel on to the shows.  This attraction is a water play area across from the Dumbo the Flying Elephant ride and The Barnstormer starring the Great Goofini.  It is designed to look like it has actual animals in the train by having elephant trunks and giraffes that spray out water at young guests.
  Title: Dumbo
  Passage: Dumbo is a 1941 American animated film produced by Walt Disney Productions and released by RKO Radio Pictures.  The fourth Disney animated feature film, it is based upon the storyline written by Helen Aberson and illustrated by Harold Pearl for the prototype of a novelty toy ("Roll-a-Book").  The main character is Jumbo Jr., a semi-anthropomorphic elephant who is cruelly nicknamed "Dumbo".  He is ridiculed for his big ears, but in fact he is capable of flying by using his ears as wings. Throughout most of the film, his only true friend, aside from his mother, is the mouse, Timothy – a relationship parodying the stereotypical animosity between mice and elephants.
citations: Casey Jr. Splash 'n' Soak Station Dumbo