of the couch. The animators are able to produce the chalkboard gags quickly and in some cases have changed them to fit current events. For example, the chalkboard gag for "Homer the Heretic" reads, "I will not defame New Orleans." The gag had been written as an apology to the city for a controversial song in the previous week's episode, which called the city a "home of pirates, drunks and whores". Another such chalkboard line gave the creators' stance on the threats made towards another popular animated sitcom, South Park, by the group Revolution Muslim, following the controversies with the episodes 200 and 201 and the depictions of Muslim prophet Mohammed (South Park- We'd stand beside you if we weren't so scared). Many episodes do not feature a chalkboard gag because they are cut to make more room for story, plot development and advertisements. In "Four Regrettings and a Funeral" (season 25, 2013), Bart writes "We'll really miss you Mrs. K" only once, in tribute to the recent death of Marcia Wallace, the voice of Edna Krabappel. In the first episode to air after Donald Trump won the United States presidential election in 2016, Bart writes "Being right sucks", a reference to the 2000 episode "Bart to the Future" where Lisa succeeds Trump as Commander-in-Chief. Chalkboard gags have not been featured since Season 33. Lisa's solo During the opening sequence, Lisa is seen being expelled from band rehearsal due to her non-conformist saxophone playing. She exits the room playing a saxophone solo, which (from the third season onward) sometimes changes. Some of the solos have similarities with pieces by Donovan, Frank Zappa, James Brown, and Charlie Parker. The Simpsons composer Alf Clausen said that the session musicians who perform her solos do not try to play at the second grade level and instead "think of Lisa as a really good player". Lisa plays the baritone saxophone, but according to Matt Groening, "she doesn't always play a baritone sax because the animators don't know what it looks like, so it changes shape and color from show to show." After the switch to HD production, Lisa has also occasionally performed her solo on an instrument other than the saxophone. As of season 20, she has played a trumpet, a violin, a fiddle, a tuba, a baritone horn, a clarinet, a theremin, and a harp. In this last instance, she drags the instrument