With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
Navy
was
concerned
about
the
lack
of
fighters
and
went
looking
for
new
designs
that
could
be
purchased
off
the
shelf
to
bring
the
squadrons
to
strength
quickly
.
The:O
Navy:O
was:O
concerned:O
about:O
the:O
lack:O
of:O
fighters:O
and:O
went:O
looking:O
for:O
new:O
designs:O
that:O
could:O
be:O
purchased:O
off:O
the:O
shelf:O
to:O
bring:O
the:O
squadrons:O
to:O
strength:O
quickly:O
.:O