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 ":".
A
small
town
(
7250
inh
.
)
A:O
small:O
town:O
(:O
7250:O
inh:O
.:O
):O