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 ":".
Akt
phosphorylates
Caspase-9
on
Ser196
,
preventing
a
caspase
cascade
leading
to
cell
death
.
Akt:other-chemicalthing
phosphorylates:other-chemicalthing
Caspase-9:other-chemicalthing
on:O
Ser196:other-chemicalthing
,:O
preventing:O
a:O
caspase:O
cascade:O
leading:O
to:O
cell:O
death:O
.:O