Complex sentence: In March 2008, following the fall of New York governor Eliot Spitzer (exposed as a customer of a high-priced prostitution ring), Koch advocated reinstating "The John Hour".
Split into simpler sentences: In March 2008, New York governor Eliot Spitzer was exposed as a customer of a high-priced prostitution ring. In the wake of this scandal, Koch advocated reinstating "The John Hour".