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
aircraft
carried
100
rounds
for
each
NS-23
and
40
rounds
for
the
N-37
.
The:O
aircraft:O
carried:O
100:O
rounds:O
for:O
each:O
NS-23:product-weapon
and:O
40:O
rounds:O
for:O
the:O
N-37:product-weapon
.:O