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
library
opened
on
June
26
,
1988
.
The:O
library:O
opened:O
on:O
June:O
26:O
,:O
1988:O
.:O