The place has gone or never existed. This is an auto-generated note from MAPS.ME application: a user reports a POI that is visible on a map (which can be outdated), but cannot be found on the ground.
POI name: 미켈란치과 강남점
POI types: amenity-dentist
OSM data version: 2018-03-16T17:06:02Z
#mapsme

"serves line 3 and line 2"
POI name: 牛角沱
POI types: railway-station-monorail
OSM data version: 2018-02-09T21:26:02Z
#mapsme

Exit B (OSM data version: 2016-12-14T16:41:03Z) #mapsme

Exit B (OSM data version: 2016-12-14T16:41:03Z) #mapsme

Exit B (OSM data version: 2016-12-14T16:41:03Z) #mapsme

Subway station name is Busan Museum of Art (OSM data version: 2017-03-06T16:48:02Z) #mapsme

"This is metro station, not railway"
POI name: 센텀시티역
POI types: building railway-station
OSM data version: 2017-07-28T09:42:02Z
#mapsme

Error. The Subway station is BEXCO. Disregard name change request. (OSM data version: 2017-03-06T16:48:02Z) #mapsme

"This is metro station, not railway"
POI name: 남포역
POI types: internet_access-wlan wheelchair-yes railway-station
OSM data version: 2017-07-28T09:42:02Z
#mapsme

"This is metro station, not railway"
POI name: 남포역
POI types: internet_access-wlan wheelchair-yes railway-station
OSM data version: 2017-07-28T09:42:02Z
#mapsme