With no explanation, label each line with "O", "product-weapon", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
basic
infantry
weapon
of
the
Marine
Corps
has
been
M16A4
service
rifle
.
The:O
basic:O
infantry:O
weapon:O
of:O
the:O
Marine:organization-other
Corps:organization-other
has:O
been:O
M16A4:product-weapon
service:O
rifle:O
.:O