premise: Una is an American-British-Canadian drama film directed by Benedict Andrews based upon the play "Blackbird" by David Harrower, who also wrote the film's screenplay. It stars Rooney Mara, Ben Mendelsohn, Riz Ahmed, Ruby Stokes, Tara Fitzgerald, Natasha Little, and Tobias Menzies.
hypothesis: Una was written and directed by Benedict Andrews.
reason: Benedict Andrews directed Una, but it was written by David Harrower. It may have been difficult because half of the statement was correct.