With no explanation, label each line with "O", "organization-company", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Kellett
also
served
as
president
of
Republic
Aviation
Corporation
from
1939
and
chairman
of
the
board
from
1943
.
Kellett:person-other
also:O
served:O
as:O
president:O
of:O
Republic:organization-company
Aviation:organization-company
Corporation:organization-company
from:O
1939:O
and:O
chairman:O
of:O
the:O
board:O
from:O
1943:O
.:O