Premise: Up the River (1938) is a prison comedy film starring Preston Foster and Arthur Treacher and featuring Bill "Bojangles" Robinson. The movie was directed by Alfred L. Werker and is a remake of a 1930 film with the same title directed by John Ford and starring Spencer Tracy and Humphrey Bogart in the roles subsequently played by Foster and Tony Martin.
Hypothesis: "Bojangles" real name was Bill Robinson who was featured in the 1938 prison comedy Up the River starring Preston Foster and Arthur Treacher. It is a remake of a previously released movie under the same name directed by John Ford.