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 ":".
Protactinium
(
V
)
chloride
is
prepared
by
reacting
protactinium
oxide
with
carbon
tetrachloride
at
temperature
of
200–300
°C
.
Protactinium:other-chemicalthing
(:other-chemicalthing
V:other-chemicalthing
):other-chemicalthing
chloride:other-chemicalthing
is:O
prepared:O
by:O
reacting:O
protactinium:other-chemicalthing
oxide:other-chemicalthing
with:O
carbon:other-chemicalthing
tetrachloride:other-chemicalthing
at:O
temperature:O
of:O
200–300:O
°C:O
.:O