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 ":".
Construction
began
in
December
2012
.
Construction:O
began:O
in:O
December:O
2012:O
.:O