You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Sergei Rachmaninoff's "Prelude in C-sharp minor" which played a prominent part in the detective novel "Overture to Death" was a single part of how many pieces to the ternary prelude he composed titled "Morceaux de fantaisie"?" whose answer is five pieces.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "Morceaux de fantaisie" Sergei Rachmaninoff structure
Useful Output:

Doc 1:  Morceaux de Fantaisie. Préludes, opus 23 (1901-1903) – Une série de 10 préludes écrits au début de sa maturité. Préludes, opus 32 (1910)
Doc 2:  Sergueï Rachmaninov (Morceaux de fantaisie, op. 3) |Source=International Music Score Library |Date=1910 |Author=Sergei Rachmaninoff
Doc 3: He gained fame from the Prelude in C-sharp minor from the composition piece Morceaux de fantaisie Op. 3, performed in the autumn of that
Doc 4: Continuons à explorer les Morceaux de fantaisie : le titre de ce cycle reflète davantage le caractère des pièces, plutôt que leur forme musicale
Doc 5: Piece Structure. The prelude in C sharp minor was originally one of a five-piece set called Morceaux de fantaisie. Now you'll find it most