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 ":".
In
March
2007
after
delays
in
obtaining
regulatory
approval
.
In:O
March:O
2007:O
after:O
delays:O
in:O
obtaining:O
regulatory:O
approval:O
.:O