What is the fine-grained topic of the following text: Julian Wachner, Trinity's Grammy-nominated winning music director, says "There are people who come to St Paul's to remember someone close who was lost in the towers, and they go to the churchyard - think of the ashes and what fell on that space - and the music heals." Only return the topic.
Julian Wachner discussing the healing power of music at St Paul's churchyard for those mourning the loss from the towers.