What is the fine-grained topic of the following text: A by-invitation-only meeting to focus on the interplay between the geopolitical, economic, and managerial challenges and opportunities facing Turkey as it becomes an important energy hub between the energy producing countries of the Trans-Caucasus/Middle East and Western Europe. Only return the topic.
The interplay of geopolitical, economic, and managerial challenges and opportunities facing Turkey as an energy hub.