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 ":".
Fifty
per
cent
nitrous
oxide
can
be
considered
for
use
by
trained
non-professional
first
aid
responders
in
prehospital
settings
,
given
the
relative
ease
and
safety
of
administering
50
%
nitrous
oxide
as
an
analgesic
.
Fifty:O
per:O
cent:O
nitrous:other-chemicalthing
oxide:other-chemicalthing
can:O
be:O
considered:O
for:O
use:O
by:O
trained:O
non-professional:O
first:O
aid:O
responders:O
in:O
prehospital:O
settings:O
,:O
given:O
the:O
relative:O
ease:O
and:O
safety:O
of:O
administering:O
50:O
%:O
nitrous:other-chemicalthing
oxide:other-chemicalthing
as:O
an:O
analgesic:O
.:O