With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
This
surface
is
now
largely
eroded
and
warped
.
This:O
surface:O
is:O
now:O
largely:O
eroded:O
and:O
warped:O
.:O