This is quite a specific question, as I am writing an essay on 'Rhapsody in Blue'.

Now I know that 'Rhapsody in Blue' is loosley classified as a piano concerto, but...

What is the exact structure of 'Rhapsody in Blue'? The version I am referring to is the full symphony orchestra score, by Ferde Grofe.

If you know the structure in terms of; (A,B,C,A) or (A1, A2, B1, B2), that would be very helpful, or even if the structure obeys conventional concerto form to any extent.

Any help would be greatly appreciated!

April is the cruellest month, breeding Lilacs out of the dead land, mixing Memory and desire, stirring Dull roots with spring rain