Question: Nonpartisan Bloc for Support of Reforms, was founded to continue the traditions of which Polish statesman,  pre-war Nonpartisan Bloc for Cooperation with the Government (BBWR)?
Sentence (from "Nonpartisan Bloc for Support of Reforms"): It was founded to continue the traditions of Józef Piłsudski's pre-war Nonpartisan Bloc for Cooperation with the Government ("Bezpartyjny Blok Współpracy z Rządem"), which likewise had been known by the same initials, "BBWR".
Relevant evidence: Yes