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 ":".
These
findings
suggest
a
possible
congenital
defect
in
the
metabolic
pathway
where
tryptophan
is
converted
to
kynurenine
.
These:O
findings:O
suggest:O
a:O
possible:O
congenital:O
defect:O
in:O
the:O
metabolic:O
pathway:O
where:O
tryptophan:other-chemicalthing
is:O
converted:O
to:O
kynurenine:other-chemicalthing
.:O