With no explanation, label each line with "O", "organization-company", "person-politician", "location-GPE", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
GM
's
W
illiam
S.
Knudsen
served
as
head
of
U.S
.
wartime
production
for
President
Franklin
Roosevelt
.
GM:location-GPE
's:location-GPE
W:O
illiam:person-other
S.:person-other
Knudsen:person-other
served:O
as:O
head:O
of:O
U.S:organization-company
.:organization-company
wartime:O
production:O
for:O
President:O
Franklin:person-politician
Roosevelt:person-politician
.:O