sentences:  His early music was inspired by composers such as Brahms and Grieg, but he soon developed his own style, first experimenting with progressive tonality and later diverging even more radically from the standards of composition still common at the time.Nielsen's sixth and final symphony, "Sinfonia semplice", was written in 1924–25.He died from a heart attack six years later, and is buried in Vestre Cemetery, Copenhagen.