What is the fine-grained topic of the following text: The new princess and her husband, Prince Carl Philip, first met Mr. Lukacevic last October 2, 2015, during the inauguration of the Idrott Utan Gränser at the Lommarskolan and the Grindskolan in Norrtälje. Only return the topic.
The meeting of Princess, Prince Carl Philip and Mr. Lukacevic at the inauguration of the Idrott Utan Gränser in Norrtälje.