With no explanation, label each line with "O", "location-mountain", "location-park", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Seoul
Grand
Park
and
Gwanaksan
occupy
a
large
portion
of
the
city
.
Seoul:location-park
Grand:location-park
Park:location-park
and:O
Gwanaksan:location-mountain
occupy:O
a:O
large:O
portion:O
of:O
the:O
city:O
.:O