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 ":".
At
one
point
,
Aldrin
attempted
a
double
Immelmann
turn
in
a
T-28
Trojan
and
suffered
a
grayout
.
At:O
one:O
point:O
,:O
Aldrin:person-soldier
attempted:O
a:O
double:O
Immelmann:O
turn:O
in:O
a:O
T-28:product-airplane
Trojan:product-airplane
and:O
suffered:O
a:O
grayout:O
.:O