Complex sentence: Yury Dmitrievich (26 November 1374--5 June 1434), also known as George II of Moscow, Yury of Zvenigorod and Jurij Zwenihorodski, was the second son of Dmitri Donskoi and Duke of Zvenigorod and Galich from 1389 until his death.
Split into simpler sentences: Yury Dmitrievich (26 November 1374--5 June 1434), also known as George II of Moscow, Yury of Zvenigorod and Jurij Zwenihorodski, was the second son of Dmitri Donskoi. He was the Duke of Zvenigorod and Galich from 1389 until his death.