Even thought I detest what became of the Simpsons after season 4, and now refuse to watch it, I need to point out that there used to be modern jazz references in it from time to time. The jazz musician that Lisa encounters playing at night on a bridge is a reference to Sonny Rllins, who famously used to practice on the Willliamsburge bridge, (referenced in his album The Bridge). The name "Bleeding Gums", due to his refusal to see a dentist, is presumably a reference to John Coltrane, who refused to seek dental assistance despite having terrible problems with his teeth. Also, the scene where Lisa is shown sleeping with the saxophone in her mouth also references Coltrane, who used to practice so intensively that he sometimes woke up and found he'd been sleeping with his saxophone in his mouth.