With no explanation, label each line with "product-other", "organization-other", "other-astronomything", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
NASA
's
Voyager
2
took
advantage
of
its
orbit
to
explore
Uranus
and
Neptune
,
the
only
spacecraft
to
ever
have
done
so
.
NASA:organization-other
's:O
Voyager:product-other
2:product-other
took:O
advantage:O
of:O
its:O
orbit:O
to:O
explore:O
Uranus:other-astronomything
and:O
Neptune:other-astronomything
,:O
the:O
only:O
spacecraft:O
to:O
ever:O
have:O
done:O
so:O
.:O