Complex sentence: Subsequently, Pope Pius VI would grant formal permission for the continuation of the Society in Russia and Poland, with Stanislaus Czerniewicz elected superior of the Society in 1782.
Split into simpler sentences: Subsequently, Pope Pius VI would grant formal permission for the continuation of the Society in Russia and Poland. As a consequence of that permission, Pole Stanislaus Czerniewicz was elected superior of the Society in 1782.