With no explanation, label each line with "organization-other", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
VB-3
Razon
was
a
high-angle
freefall
guided
bomb
developed
by
the
United
States
Army
Air
Force
during
the
1940s
.
The:O
VB-3:product-weapon
Razon:product-weapon
was:O
a:O
high-angle:O
freefall:O
guided:O
bomb:O
developed:O
by:O
the:O
United:organization-other
States:organization-other
Army:organization-other
Air:organization-other
Force:organization-other
during:O
the:O
1940s:O
.:O