Complex sentence: Michał Kazimierz Pac (b.1624-d.4 April 1682, Vokė (now Vilnius)) was a Grand Hetman of Lithuania since 1667 and the voivod of Wilno since 1669.
Split into simpler sentences: Michał Kazimierz Pac (b.1624-d.4 April 1682, Vokė (now Vilnius)) was a magnate of the Grand Duchy of Lithuania of the Pac family. He had been the Grand Hetman of Lithuania since 1667 and the voivod of Wilno since 1669.