With no explanation, label each line with "organization-other", "O", "product-ship", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Five
days
into
her
fourth
patrol
,
on
21
December
1941
,
``
U-751
``
attacked
and
sank
,
an
Escort
carrier
attached
with
British
convoy
HG
76
.
Five:O
days:O
into:O
her:O
fourth:O
patrol:O
,:O
on:O
21:O
December:O
1941:O
,:O
``:O
U-751:product-ship
``:O
attacked:O
and:O
sank:O
,:O
an:O
Escort:O
carrier:O
attached:O
with:O
British:organization-other
convoy:organization-other
HG:organization-other
76:organization-other
.:O