What is the fine-grained topic of the following text: The Bostonian rock legends have been long rumoured to start winding down on their four decades plus together, and it has now been confirmed by the band, as well as Download Festival organiser Andy Copping, that Download 2017 will be Aerosmith’s last appearance in the UK. Only return the topic.
Aerosmith's final UK appearance at Download 2017 Festival