With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Following
the
state
bar
's
announcement
,
Nifong
submitted
a
letter
of
resignation
from
his
post
as
Durham
County
district
attorney
,
that
would
have
become
effective
in
July
2007
.
Following:O
the:O
state:O
bar:O
's:O
announcement:O
,:O
Nifong:person-other
submitted:O
a:O
letter:O
of:O
resignation:O
from:O
his:O
post:O
as:O
Durham:O
County:O
district:O
attorney:O
,:O
that:O
would:O
have:O
become:O
effective:O
in:O
July:O
2007:O
.:O