With no explanation, label each line with "organization-other", "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
prisoners
had
initially
gone
unnoticed
until
Yemeni
officials
told
the
CIA
station
chief
in
San
'
a
,
Yemen
's
capital
,
that
some
of
the
men
the
FBI
wanted
were
already
being
held
.
The:O
prisoners:O
had:O
initially:O
gone:O
unnoticed:O
until:O
Yemeni:organization-government/governmentagency
officials:organization-government/governmentagency
told:O
the:O
CIA:organization-other
station:O
chief:O
in:O
San:organization-government/governmentagency
':organization-government/governmentagency
a:organization-government/governmentagency
,:O
Yemen:organization-government/governmentagency
's:organization-government/governmentagency
capital:organization-government/governmentagency
,:O
that:O
some:O
of:O
the:O
men:O
the:O
FBI:organization-other
wanted:O
were:O
already:O
being:O
held:O
.:O