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 ":".
Healthy
eating
was
becoming
popular
and
the
recession
was
approaching
.
Healthy:O
eating:O
was:O
becoming:O
popular:O
and:O
the:O
recession:O
was:O
approaching:O
.:O