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
network
commercial
launch
was
in
late
2011
.
The:O
network:O
commercial:O
launch:O
was:O
in:O
late:O
2011:O
.:O