With no explanation, label each line with "location-GPE", "person-soldier", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Christian
was
transferred
to
the
19th
Bombardment
Group
at
Clark
Field
in
the
Philippines
in
March
1941
.
Christian:person-soldier
was:O
transferred:O
to:O
the:O
19th:O
Bombardment:organization-other
Group:organization-other
at:O
Clark:location-GPE
Field:location-GPE
in:O
the:O
Philippines:location-GPE
in:O
March:O
1941:O
.:O