With no explanation, label each line with "location-GPE", "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
During
the
engagement
,
Chapman
suffered
a
head
wound
,
most
likely
from
an
attack
by
then
four-victory
German
flier
Walter
Höhndorf
.
During:O
the:O
engagement:O
,:O
Chapman:person-soldier
suffered:O
a:O
head:O
wound:O
,:O
most:O
likely:O
from:O
an:O
attack:O
by:O
then:O
four-victory:O
German:location-GPE
flier:O
Walter:person-soldier
Höhndorf:person-soldier
.:O