What is the fine-grained topic of the following text: On August 8 a guided tour will be organised by Berlin Postkolonial at the M*straße in Berlin - a street name that, quite unbelievably, is still being used not only because in our society it's largely ignored how language can harm, but also because it deals with a history that Germany likes to deny: its very own participation in the transatlantic slave trade, visualised on that map in Stonetown. Only return the topic.
Berlin Postkolonial's organized tour addressing Germany's participation in the transatlantic slave trade