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 ":".
This
was
the
first
ever
successful
shipboard
landing
of
an
aircraft
,
and
the
first
to
use
the
tailhook
system
,
leading
to
today
's
aircraft
carrier
technology
.
This:O
was:O
the:O
first:O
ever:O
successful:O
shipboard:O
landing:O
of:O
an:O
aircraft:O
,:O
and:O
the:O
first:O
to:O
use:O
the:O
tailhook:O
system:O
,:O
leading:O
to:O
today:O
's:O
aircraft:O
carrier:O
technology:O
.:O