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 ":".
Melatonin
may
repress
stimulation
of
reproduction
in
long-day
breeders
and
stimulate
reproduction
in
short-day
breeders
.
Melatonin:other-biologything
may:O
repress:O
stimulation:O
of:O
reproduction:O
in:O
long-day:O
breeders:O
and:O
stimulate:O
reproduction:O
in:O
short-day:O
breeders:O
.:O