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 ":".
Further
,
TrkC
binds
and
is
activated
by
NT-3
.
Further:O
,:O
TrkC:other-biologything
binds:O
and:O
is:O
activated:O
by:O
NT-3:other-biologything
.:O