Task: Question Generation
Input (English): Passage: Marcel Marnat's catalogue of Ravel's complete works lists eighty-five works, including many incomplete or abandoned. Though that total is small in comparison with the output of his major contemporaries, it is nevertheless inflated by Ravel's frequent practice of writing works for piano and later rewriting them as independent pieces for orchestra. The performable body of works numbers about sixty; slightly more than half are instrumental. Ravel's music includes pieces for piano, chamber music, two piano concerti, ballet music, opera, and song cycles. He wrote no symphonies or church works.Ravel drew on many generations of French composers from Couperin and Rameau to Fauré and the more recent innovations of Satie and Debussy. Foreign influences include Mozart, Schubert, Liszt and Chopin. He considered himself in many ways a classicist, often using traditional structures and forms, such as the ternary, to present his new melodic and rhythmic content and innovative harmonies. The influence of jazz on his later music is heard within conventional classical structures in the Piano Concerto and the Violin Sonata.
Ravel placed high importance on melody, telling Vaughan Williams that there is "an implied melodic outline in all vital music". His themes are frequently modal instead of using the familiar major or minor scales. As a result, there are few leading notes in his output. Chords of the ninth and eleventh and unresolved appoggiaturas, such as those in the Valses nobles et sentimentales, are characteristic of Ravel's harmonic language.Dance forms appealed to Ravel, most famously the bolero and pavane, but also the minuet, forlane, rigaudon, waltz, czardas, habanera and passacaglia. National and regional consciousness was important to him, and although a planned concerto on Basque themes never materialised, his works include allusions to Hebraic, Greek, Hungarian and gypsy themes. He wrote several short pieces paying tribute to composers he admired – Borodin, Chabrier, Fauré and Haydn, interpreting their characteristics in a Ravellian style. Another important influence was literary rather than musical: Ravel said that he learnt from Poe that "true art is a perfect balance between pure intellect and emotion", with the corollary that a piece of music should be a perfectly balanced entity with no irrelevant material allowed to intrude.
Output (English): What are the specific names of the four composers to whom Ravel wrote several short pieces paying tribute?