With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Chronic
exposure
to
anabolic
steroids
may
also
induce
a
persistent
anestrus
due
to
negative
feedback
on
the
hypothalamus
/
pituitary
/
gonadal
axis
.
Chronic:O
exposure:O
to:O
anabolic:other-biologything
steroids:other-biologything
may:O
also:O
induce:O
a:O
persistent:O
anestrus:O
due:O
to:O
negative:O
feedback:O
on:O
the:O
hypothalamus:other-biologything
/:O
pituitary:other-biologything
/:O
gonadal:other-biologything
axis:other-biologything
.:O