This is the 1585th most frequent Korean word.
더불어민주당이
"더불어민주당이" refers to "The Democratic Party of Korea" (a political party in South Korea).
Here, '더불어민주당이' is the subject of the sentence, indicating who proposed the reforms.
더불어민주당이 정책 개혁을 제안했습니다.
The Democratic Party of Korea proposed policy reforms.
In this sentence, '더불어민주당이' functions as the subject that organizes the event.
더불어민주당이 주관한 행사에 참석했습니다.
I attended an event organized by the Democratic Party of Korea.
Here, '더불어민주당이' serves as the subject, indicating who might win the election.