Complex sentence: On December 27,2002, Oxana Fedorova successfully defended her doctoral thesis, and subsequently, she obtained her Ph.D. in Civil Law from the Saint Petersburg University of the Ministry of Interior of Russia (MVD University) on May 16,2003.
Split into simpler sentences: On December 27,2002, Oxana Fedorova successfully defended her doctoral thesis. She officially obtained a Ph.D. in Civil Law from the Saint Petersburg University of the Ministry of Interior of Russia (MVD University) on May 16,2003.