With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Serotonergic
action
is
terminated
primarily
via
uptake
of
5-HT
from
the
synapse
.
Serotonergic:O
action:O
is:O
terminated:O
primarily:O
via:O
uptake:O
of:O
5-HT:other-chemicalthing
from:O
the:O
synapse:O
.:O