Steven Spielberg:

Spielberg directed 2015's Bridge of Spies, a Cold War thriller based on the 1960 U-2 incident, and focusing on James B. Donovan's negotiations with the Soviets for the release of pilot Gary Powers after his aircraft was shot down over Soviet territory. The film starred Tom Hanks as Donovan, as well as Mark Rylance, Amy Ryan, and Alan Alda, with a script by the Coen brothers. The film was shot from September to December 2014 on location in New York City, Berlin and Wroclaw, Poland (which doubled for East Berlin), and was released by Disney on October 16, 2015. Bridge of Spies received positive reviews from critics, and was nominated for six Academy Awards, including Best Picture.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". How many movies has Tom Hanks been in that have won Best Picture?
unanswerable