Complex sentence: Duda began his political career with the now-defunct Freedom Union Party in the early 2000s, but after the parliamentary elections in 2005, began his collaboration with the Law and Justice Party (PIS).
Split into simpler sentences: Duda began his political career with the now-defunct Freedom Union Party in the early 2000s. After the parliamentary elections in 2005, he began his collaboration with the Law and Justice Party (PIS).