What is the fine-grained topic of the following text: Clug succeeded in putting the Maribor Ballet ensemble on the international dancing map by participating in the largest theatre festivals, such as Jacob's Pillow Dance Festival (USA), The Stars of the White Nights festival in the Mariinski Theatre St.Petersburg, Arts Festival in Singapore and Seoul International Dance Festival in Korea. Only return the topic.
Clug's contribution in elevating the Maribor Ballet ensemble's international recognition through various theatre festivals.