With no explanation, label each line with "O", "location-park", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Most
caves
created
from
dissolved
rocks
are
formed
in
limestone
or
dolomite
,
but
Oregon
Caves
was
formed
in
marble
.
Most:O
caves:O
created:O
from:O
dissolved:O
rocks:O
are:O
formed:O
in:O
limestone:O
or:O
dolomite:O
,:O
but:O
Oregon:location-park
Caves:location-park
was:O
formed:O
in:O
marble:O
.:O