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 ":".
He
left
the
club
within
6
months
.
He:O
left:O
the:O
club:O
within:O
6:O
months:O
.:O