With no explanation, label each line with "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
General
Gribble
then
announced
a
tradition
of
passing
the
insignia
along
to
future
Chiefs
of
Engineers
,
and
it
has
been
done
so
since
.
General:O
Gribble:person-soldier
then:O
announced:O
a:O
tradition:O
of:O
passing:O
the:O
insignia:O
along:O
to:O
future:O
Chiefs:O
of:O
Engineers:O
,:O
and:O
it:O
has:O
been:O
done:O
so:O
since:O
.:O