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 ":".
While
TrkB
mediates
the
effects
of
BDNF
,
NT-4
and
NT-3
,
TrkA
is
bound
and
thereby
activated
only
by
NGF
.
While:O
TrkB:other-biologything
mediates:O
the:O
effects:O
of:O
BDNF:other-biologything
,:O
NT-4:other-biologything
and:O
NT-3:other-biologything
,:O
TrkA:other-biologything
is:O
bound:O
and:O
thereby:O
activated:O
only:O
by:O
NGF:other-biologything
.:O