Question: What was the nationality of the man under whose apprenticeship Igor Stravinsky composed The Symphony in E-flat major?
Sentence (from "Concerto in E-flat &quot;Dumbarton Oaks&quot;"): Concerto in E-flat, subtitled Dumbarton Oaks 8-v-1938 (1937–38) is a chamber concerto by Igor Stravinsky, named for the Dumbarton Oaks estate of Robert Woods Bliss and Mildred Barnes Bliss in Washington, DC, who commissioned it for their thirtieth wedding anniversary.
Relevant evidence: No