Complex sentence: No park commissioner since Moses has been able to exercise the same degree of power, nor did the Park Commission remain as stable a position in the aftermath of his departure, with eight commissioners holding the office in the twenty years following.
Split into simpler sentences: No park commissioner since Moses has been able to exercise the same degree of power. Nor did the Park Commission remain as stable a position in the aftermath of his departure, with eight commissioners holding the office in the twenty years following.