Complex sentence: The strong resistance of local elites, both aristocrats and ecclesiastical, which peaked in a revolt in Brussels on 14 May 1787, induced, finally, the Emperor to dissolve the Provincial States of Brabant and Hainaut, in 18 June 1789.
Split into simpler sentences: The strong resistance of local elites, both aristocrats and ecclesiastical, peaked in a revolt in Brussels on 14 May 1787. This induced, finally, the Emperor to dissolve the Provincial States of Brabant and Hainaut, on 18 June 1789.