Question: "The Boy Next Door" is a popular song in a musical film about what family?
Sentence (from "Meet Me in St. Louis"): Divided into a series of seasonal vignettes, starting with Summer 1903, it relates the story of a year in the life of the Smith family in St. Louis, leading up to the opening of the Louisiana Purchase Exposition (more commonly referred to as the World's Fair) in the spring of 1904.
Relevant evidence: Yes