With no explanation, label each line with "O", "other-medical", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
occurs
naturally
in
the
adrenal
cortex
and
during
first-pass
metabolism
in
the
liver
and
intestines
when
exogenous
DHEA
is
administered
orally
.
This:O
occurs:O
naturally:O
in:O
the:O
adrenal:O
cortex:O
and:O
during:O
first-pass:O
metabolism:O
in:O
the:O
liver:O
and:O
intestines:O
when:O
exogenous:other-medical
DHEA:other-medical
is:O
administered:O
orally:O
.:O