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
is
thought
to
act
by
regulating
the
hypothalamic
pulse
activity
of
the
gonadotropin-releasing
hormone
.
Melatonin:other-biologything
is:O
thought:O
to:O
act:O
by:O
regulating:O
the:O
hypothalamic:other-biologything
pulse:O
activity:O
of:O
the:O
gonadotropin-releasing:other-biologything
hormone:other-biologything
.:O