Complex sentence: Plotnikov immigrated to Canada in 2005 at the age of 15, along with his Christian family from the Western Siberian town of Megion in Tyumen Oblast, Russian Soviet Federative Socialist Republic, where he was born to an ethnic Russian father and an ethnic Tatar mother.
Split into simpler sentences: Plotnikov immigrated to Canada in 2005 from Russia at the age of 15, along with his Christian family from the Western Siberian town of Megion in Tyumen Oblast. He was born in the Russian Soviet Federative Socialist Republic to an ethnic Russian father and an ethnic Tatar mother.