With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
As
protactinium
(
IV
)
oxide
,
like
other
protactinium
compounds
,
is
radioactive
,
toxic
and
very
rare
,
it
has
no
known
technological
use
.
As:O
protactinium:other-chemicalthing
(:other-chemicalthing
IV:other-chemicalthing
):other-chemicalthing
oxide:other-chemicalthing
,:O
like:O
other:O
protactinium:other-chemicalthing
compounds:O
,:O
is:O
radioactive:O
,:O
toxic:O
and:O
very:O
rare:O
,:O
it:O
has:O
no:O
known:O
technological:O
use:O
.:O