With no explanation, label each line with "O", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
were
almost
identical
in
appearance
to
the
Class
116
.
They:O
were:O
almost:O
identical:O
in:O
appearance:O
to:O
the:O
Class:product-train
116:product-train
.:O