Question: What nationality is the director of film A Patch Of Blue?
Sentence (from "A Patch of Blue"): A Patch of Blue is a 1965 American drama film directed by Guy Green about the relationship between a black man (played by Sidney Poitier) and a blind white female teenager (played by Elizabeth Hartman), and the problems that plague their relationship when they fall in love in a racially divided America.
Relevant evidence: Yes