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
vote
to
merge
was
held
on
March
21
,
2015
.
The:O
vote:O
to:O
merge:O
was:O
held:O
on:O
March:O
21:O
,:O
2015:O
.:O