With no explanation, label each line with "product-other", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
combination
of
Phoenix
missile
and
the
AN/AWG-9
guidance
radar
was
the
first
aerial
weapons
system
that
could
simultaneously
engage
multiple
targets
.
The:O
combination:O
of:O
Phoenix:product-weapon
missile:O
and:O
the:O
AN/AWG-9:product-other
guidance:product-other
radar:product-other
was:O
the:O
first:O
aerial:O
weapons:O
system:O
that:O
could:O
simultaneously:O
engage:O
multiple:O
targets:O
.:O