With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
On
14
May
,
he
engaged
in
aerial
combat
with
French
Morane-Saulnier
M.S.406
fighters
and
claimed
one
of
the
aircraft
shot
down
.
On:O
14:O
May:O
,:O
he:O
engaged:O
in:O
aerial:O
combat:O
with:O
French:product-airplane
Morane-Saulnier:product-airplane
M.S.406:product-airplane
fighters:O
and:O
claimed:O
one:O
of:O
the:O
aircraft:O
shot:O
down:O
.:O