This is the 10652nd most frequent Korean word.
군공항이
"Military airport."
In this sentence, '군공항이' is again the subject, this time in a locational context, grounding the statement about the surroundings.
군공항이 주위에는 높은 건물이 많지 않습니다.
There aren't many tall buildings around the military airport.
Here, '군공항이' functions as the subject of the sentence, indicating the entity that was expanded.
군공항이 오늘 아침에 확장되었습니다.
The military airport was expanded this morning.
'군공항이' serves as the subject of the question, referring to the entity whose distance is being queried.