Ellington's long-term aim, though, was to extend the jazz form from that three-minute limit, of which he was an acknowledged master. While he had composed and recorded some extended pieces before, such works now became a regular feature of Ellington's output. In this, he was helped by Strayhorn, who had enjoyed a more thorough training in the forms associated with classical music than Ellington. The first of these, "Black, Brown and Beige" (1943), was dedicated to telling the story of African-Americans, and the place of slavery and the church in their history. "Black, Brown and Beige" debuted at Carnegie Hall on January 23, 1943, beginning an annual series of Ellington concerts at the venue over the next four years. While some jazz musicians had played at Carnegie Hall before, none had performed anything as elaborate as Ellington's work. Unfortunately, starting a regular pattern, Ellington's longer works were generally not well received.