With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
NASP
was
supposed
to
have
been
a
scramjet
powered
hypersonic
aircraft
,
but
failed
in
development
.
The:O
NASP:product-airplane
was:O
supposed:O
to:O
have:O
been:O
a:O
scramjet:O
powered:O
hypersonic:O
aircraft:O
,:O
but:O
failed:O
in:O
development:O
.:O