Question: Seimas ("Sejm", "Sojm", Belarusian: Сойм ) was an early parliament in the Grand Duchy of Lithuania, The Union of Lublin created a new state, the Polish–Lithuanian Commonwealth, and joined the Seimas of Lithuania with Sejm of Poland into one organization, the bicameral parliament of the Polish–Lithuanian Commonwealth is officially titled what?
Sentence (from "Sejm of the Polish–Lithuanian Commonwealth"): The sejm was a powerful political institution and the king could not pass laws without the approval of that body.
Relevant evidence: No