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 ":".
It
opened
in
July
1906
and
closed
on
1
May
1915
.
It:O
opened:O
in:O
July:O
1906:O
and:O
closed:O
on:O
1:O
May:O
1915:O
.:O