With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A
very
common
type
is
the
DB
Class
V
60
and
its
variants
.
A:O
very:O
common:O
type:O
is:O
the:O
DB:product-other
Class:product-other
V:product-other
60:product-other
and:O
its:O
variants:O
.:O