I want to know the answer to the following question:
Saxophone was featured as a solo instrument in what Sergei Rachmaninoff piece?
All the background I'm provided with is that "The euphonium is featured in a few late Romantic and 20th-century works, usually playing parts marked "tenor tuba", including Gustav Holst's The Planets, and Richard Strauss's Ein Heldenleben.". Is that enough to answer the question?