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 ":".
The
population
of
the
town
peaked
at
40
,
with
most
residents
being
employed
with
the
railroad
.
The:O
population:O
of:O
the:O
town:O
peaked:O
at:O
40:O
,:O
with:O
most:O
residents:O
being:O
employed:O
with:O
the:O
railroad:O
.:O