This is the 6108th most frequent Korean word.
세웠다고
"세웠다고" means "said (someone) stopped/established (something)."
Here, '세웠다고' (sewotdago) is used to report or quote the action of building (세우다).
그는 건물을 세웠다고 자랑했어요.
He boasted that he had built a building.
In this sentence, '세웠다고' (sewotdago) indicates the act of setting (a goal) as a reported action.
나는 스스로 목표를 세웠다고 말했어요.
I said that I had set a goal for myself.
Here, '세웠다고' (sewotdago) is employed to reference the action of establishing (a law).