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 ":".
These
commuting
zones
were
developed
without
regard
to
a
minimum
population
threshold
and
are
intended
to
be
a
spatial
measure
of
the
local
labor
market
.
These:O
commuting:O
zones:O
were:O
developed:O
without:O
regard:O
to:O
a:O
minimum:O
population:O
threshold:O
and:O
are:O
intended:O
to:O
be:O
a:O
spatial:O
measure:O
of:O
the:O
local:O
labor:O
market:O
.:O