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
2011
,
the
park
opened
,
an
indoor
themed
laser
tag
attraction
.
In:O
2011:O
,:O
the:O
park:O
opened:O
,:O
an:O
indoor:O
themed:O
laser:O
tag:O
attraction:O
.:O