With no explanation, label each line with "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
An
additional
,
57
Kaw
served
in
the
9th
Cavalry
regiment
as
scouts
and
21
died
in
service
.
An:O
additional:O
,:O
57:O
Kaw:O
served:O
in:O
the:O
9th:organization-other
Cavalry:organization-other
regiment:organization-other
as:O
scouts:O
and:O
21:O
died:O
in:O
service:O
.:O