What is the fine-grained topic of the following text: We had time to stop at Billy Bragg for a couple of photos and a rousing rendition of Bob Marley’s “One Love”, replacing the line of “let’s get together and feel alright” with Bragg’s version, “Let’s drop the debt and it will be alright,” in reference to the enormous debt of African countries to the developed world. Only return the topic.
Performing Bob Marley's "One Love" with modified lyrics at Billy Bragg referencing African countries' debt