Simplify the following text for a Grade 5 native English-speaking person.
Original: It is one of Chopin 's most famous preludes , along with Prelude Op .
Simplified: The Prelude Op . 28 , No. 15 , by FrÃ dÃ ric Chopin , known as the `` Raindrop '' prelude , is one of the 24 Chopin preludes .