What is the fine-grained topic of the following text: THE JOHN CAGE EGG a brand new poem by Ian McMillan was written especially for An Aldeburgh Musicircus and in particular response to ‘Vexations’, the piece of music by Erik Satie which, like John Cage, we performed 840 times in succession. Only return the topic.
Ian McMillan's poem "THE JOHN CAGE EGG" in response to Erik Satie's "Vexations" for An Aldeburgh Musicircus