What is the fine-grained topic of the following text: "It was decided that Russian Ambassador Mikhail Zurabov will take part in the official ceremony of Ukraine's presidential inauguration, which is due to be held on June 7," Russian deputy foreign minister Grigory Karasin was quoted as saying by news agency Itar-Tass. Only return the topic.
Russian Ambassador Mikhail Zurabov's participation in Ukraine's presidential inauguration ceremony.