This is the 17493rd most frequent Korean word.
성남지청장이
"Chief of the Seongnam branch office."
In this sentence, '성남지청장이' acts as the subject of the sentence, referring to the person who holds the position of the head of the office.
성남지청장이 새로운 정책을 발표했습니다.
The head of Seongnam District Office announced new policies.
Here, '성남지청장이' is the subject denoting the individual who was absent from the mentioned meeting.
회의에서 성남지청장이 불참했습니다.
The head of Seongnam District Office did not attend the meeting.
In this usage, '성남지청장이의' indicates possession, referring to the opinion belonging to the head of the office.