Question: Who directed the 2014 biographical war drama film starring Keir O'Donnell?
Sentence (from "American Sniper"): It stars Cooper as Kyle and Sienna Miller as his wife Taya, with Luke Grimes, Jake McDorman, Cory Hardrict, Kevin Lacz, Navid Negahban, and Keir O'Donnell in supporting roles.
Relevant evidence: No