Question: What nationality is the director of film Command Decision (Film)?
Sentence (from "Command Decision (film)"): Command Decision is a 1949 war film released by Metro-Goldwyn-Mayer starring Clark Gable, Walter Pidgeon, Van Johnson, and Brian Donlevy, and directed by Sam Wood, based on a stage play of the same name written by William Wister Haines, which he based on his best-selling novel.
Relevant evidence: Yes