With no explanation, label each line with "product-airplane", "O", "organization-company", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
In
1962
,
Lockheed
built
the
XV-4
Hummingbird
for
the
U.S.
Army
.
In:O
1962:O
,:O
Lockheed:organization-company
built:O
the:O
XV-4:product-airplane
Hummingbird:product-airplane
for:O
the:O
U.S.:organization-other
Army:organization-other
.:O