Question: What nationality is the director of film Belles On Their Toes (Film)?
Sentence (from "Belles on Their Toes (film)"): Belles on Their Toes is a Technicolor film based on the autobiographical book "Belles on Their Toes" (1950) by siblings Frank Bunker Gilbreth, Jr. and Ernestine Gilbreth Carey.
Relevant evidence: No