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 ":".
Trade
increased
from
in
1840
,
before
the
harbour
opened
,
to
shortly
afterwards
.
Trade:O
increased:O
from:O
in:O
1840:O
,:O
before:O
the:O
harbour:O
opened:O
,:O
to:O
shortly:O
afterwards:O
.:O