With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Torpedoed
on
15
September
1940
and
sunk
by
at
while
a
member
of
Convoy
SC
3
.
Torpedoed:O
on:O
15:O
September:O
1940:O
and:O
sunk:O
by:O
at:O
while:O
a:O
member:O
of:O
Convoy:O
SC:O
3:O
.:O