Original sentence: The same month, Poland's newspaper, Rzeczpospolita, published documents – some that were leaked – from the files of the former Polish Secret Service (at the time headed by Kaczynski's political opponents) that discussed then dissident Kaczyński's sexuality due to fact of his single status
Edited sentence: The same month, Poland's second-most important newspaper, Rzeczpospolita, published documents – some that were leaked – from the files of the former Polish Secret Service (at the time headed by Kaczynski's political opponents) that discussed then dissident Kaczyński's sexuality due to fact of his single status