With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Barrett
M95
is
the
improved
variant
of
the
Barrett
M90
.
The:O
Barrett:product-weapon
M95:product-weapon
is:O
the:O
improved:O
variant:O
of:O
the:O
Barrett:product-weapon
M90:product-weapon
.:O