This is the 3019th most frequent Korean word.
포항
Pohang: A coastal city in North Gyeongsang Province, South Korea.
In this sentence, '포항' is used as a proper noun to designate the name of a city in South Korea.
포항은 경상북도에 위치한 도시입니다.
Pohang is a city located in Gyeongsangbuk-do.
Here, '포항' is used in conjunction with the locative particle '에' to indicate the location connected to visiting a friend.
나는 포항에 있는 친구를 방문할 예정입니다.
I plan to visit a friend who is in Pohang.
In this sentence, '포항에서' (Pohang-eseo) uses an instrumental particle to indicate the origin of an action, the festival's location.