The Prelude No. 4 in E Minor, Opus 28 is a musical work composed by Frédéric Chopin in the early 19th century.
It was performed by Matthew, a boy living in a Human colony on Moab IV. Matthew played the piece on the piano during a concert for the colonists and the visiting crew of the USS Enterprise-D in 2368. (TNG: "The Masterpiece Society")