With no explanation, label each line with "location-GPE", "product-airplane", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
One
F-117
fighter
was
lost
over
Yugoslavia
on
27
March
1999
,
apparently
struck
by
a
salvo
of
SA-3
Goa
surface-to-air
missiles
.
One:O
F-117:product-airplane
fighter:product-airplane
was:O
lost:O
over:O
Yugoslavia:location-GPE
on:O
27:O
March:O
1999:O
,:O
apparently:O
struck:O
by:O
a:O
salvo:O
of:O
SA-3:product-weapon
Goa:product-weapon
surface-to-air:product-weapon
missiles:product-weapon
.:O