With no explanation, label each line with "person-soldier", "O", "product-airplane", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
On
15
March
1943
Mansfeld
and
Janáček
shot
down
a
Ju
88
.
On:O
15:O
March:O
1943:O
Mansfeld:person-soldier
and:O
Janáček:person-soldier
shot:O
down:O
a:O
Ju:product-airplane
88:product-airplane
.:O