This is the 9470th most frequent Korean word.
경기도민이
A resident of Gyeonggi Province in South Korea.
In this sentence, '경기도민이' is used as the subject to describe the people who are partaking in the festivals.
경기도민이 여러 축제를 즐기고 있습니다.
Citizens of Gyeonggi-do are enjoying various festivals.
Here, '경기도민이라서' is used to explain a reason, specifying that knowledge of the area is attributed to being a resident of Gyeonggi-do.
그는 경기도민이라서 이 지역에 대해 잘 알고 있어요.
Because he is a citizen of Gyeonggi-do, he knows this area well.
In this case, '많은 경기도민이' indicates a group of people, enhancing the sentence by quantifying and specifying the subject.