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
is
a
baby
step
in
that
direction
.
''
This:O
is:O
a:O
baby:O
step:O
in:O
that:O
direction:O
.:O
'':O