With no explanation, label each line with "location-GPE", "O", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
In
1921
,
Feiker
joined
the
personal
staff
of
United
States
Secretary
of
Commerce
Herbert
Hoover
as
a
press
aide
.
In:O
1921:O
,:O
Feiker:person-other
joined:O
the:O
personal:O
staff:O
of:O
United:location-GPE
States:location-GPE
Secretary:O
of:O
Commerce:O
Herbert:person-politician
Hoover:person-politician
as:O
a:O
press:O
aide:O
.:O