Complex sentence: Around half of the Silesian Voivodeship's territory belongs to the historical province of Lesser Poland, same with the area of Radom, which is part of Lesser Poland, but is located in the Masovian Voivodeship.
Split into simpler sentences: Around half of Silesian Voivodeship belongs to the historical province of Lesser Poland. Similar the area around Radom, which historically is part of Lesser Poland, is located in Masovian Voivodeship.