With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
However
delays
in
development
of
the
engines
meant
these
would
be
unavailable
and
so
the
aircraft
was
redesigned
to
use
six
450
hp
Napier
Lion
engines
to
give
a
similar
power/weight
ratio
,
and
a
third
,
upper
wing
added
.
However:O
delays:O
in:O
development:O
of:O
the:O
engines:O
meant:O
these:O
would:O
be:O
unavailable:O
and:O
so:O
the:O
aircraft:O
was:O
redesigned:O
to:O
use:O
six:O
450:O
hp:O
Napier:product-other
Lion:product-other
engines:product-other
to:O
give:O
a:O
similar:O
power/weight:O
ratio:O
,:O
and:O
a:O
third:O
,:O
upper:O
wing:O
added:O
.:O