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 ":".
Come
March
,
the
Train
was
in
high
demand
.
Come:O
March:O
,:O
the:O
Train:O
was:O
in:O
high:O
demand:O
.:O