With no explanation, label each line with "organization-other", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
May
1957
,
President
Eisenhower
appointed
him
as
the
fifth
Secretary
of
the
Air
Force
.
In:O
May:O
1957:O
,:O
President:person-politician
Eisenhower:person-politician
appointed:O
him:O
as:O
the:O
fifth:O
Secretary:O
of:O
the:O
Air:organization-other
Force:organization-other
.:O