Examples of that form include The Cascades, Silver Swan, and Magnetic.
One of this man's operas about a 1901 White House dinner honoring Booker T. Washington, entitled A Guest of Honor, has been lost. In another of his operas, the title freed slave is kidnapped by "conjur men" and saved by Remus. This composer pioneered a form with an AA BB A CC DD structure, and four themes or strains, each 16 bars long. Examples of that form include The Cascades, Silver Swan, and Magnetic. In addition to the opera Treemonisha, this man wrote The Entertainer. For 10 points, name this composer of  the Maple Leaf Rag.
One of this man's operas about a 1901 White House dinner honoring Booker T. Washington, entitled A Guest of Honor, has been lost.
Scott {Joplin}