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 ":".
Class
F1a
consisted
of
twenty
locomotives
,
Nos
.
Class:O
F1a:O
consisted:O
of:O
twenty:O
locomotives:O
,:O
Nos:O
.:O