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 ":".
Intravenous
sodium
benzoate
and
sodium
phenylacetate
may
be
helpful
.
Intravenous:O
sodium:other-chemicalthing
benzoate:other-chemicalthing
and:O
sodium:other-chemicalthing
phenylacetate:other-chemicalthing
may:O
be:O
helpful:O
.:O