This is the 17210th most frequent Korean word.
서울경찰청장은
"Seoul Police Commissioner."
In this sentence, "서울경찰청장은" refers to the subject of the sentence who made the announcement, functioning as the nominative form.
서울경찰청장은 중요한 발표를 하였습니다.
The chief of Seoul police made an important announcement.
Here "서울경찰청장은" is used as the subject, focusing on their role in leading crime prevention efforts.
서울경찰청장은 다양한 범죄 예방 활동을 주도합니다.
The chief of Seoul police leads various crime prevention activities.
In this context, "서울경찰청장" is the indirect object of the verb "요청했습니다" (requested), showing interaction by residents with the individual in the given position.