With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Bolesław I had taken control of the marches of Lusatia (Łużyce), Sorbian Meissen (Miśnia), and the cities of Budziszyn (Bautzen) and Meissen in 1002, but only refused to pay the tribute to the Empire from Lusatia and Sorbian Meissen. Bolesław, after the Polish-German War (1002–1018), signed the Peace of Bautzen on 30 January 1018, which made Bolesław I a clear winner. The Polish ruler was able to keep the contested marches of Lusatia and Sorbian Meissen not as fiefs, but as part of Polish territory. The Polish prince Mieszko destroyed about 100 Sorbian villages in 1030 and expelled Sorbians from urban areas, with the exception of fishermen and carpenters who were allowed to live in the outskirts.
text_B: Is it likely that the Empire's revenue decreased after Bolesław I captured the territories?
YES.