With no explanation, label each line with "product-airplane", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
time
of
the
accident
,
there
were
27
other
Boeing
747-400
aircraft
in
the
Korean
Air
fleet
.
At:O
the:O
time:O
of:O
the:O
accident:O
,:O
there:O
were:O
27:O
other:O
Boeing:product-airplane
747-400:product-airplane
aircraft:O
in:O
the:O
Korean:organization-other
Air:organization-other
fleet:O
.:O