With no explanation, label each line with "building-other", "O", "organization-company", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Browning
and
the
Winchester
engineers
also
developed
the
Browning
.50
caliber
machine
gun
during
the
war
.
Browning:organization-company
and:O
the:O
Winchester:building-other
engineers:O
also:O
developed:O
the:O
Browning:product-weapon
.50:product-weapon
caliber:O
machine:O
gun:O
during:O
the:O
war:O
.:O