With no explanation, label each line with "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
On
March
25
,
1981
militants
of
the
Liberation
Tigers
of
Tamil
Eelam
and
Tamil
Eelam
Liberation
Organization
robbed
a
bank
van
of
Rs
.
On:O
March:O
25:O
,:O
1981:O
militants:O
of:O
the:O
Liberation:organization-other
Tigers:organization-other
of:organization-other
Tamil:organization-other
Eelam:organization-other
and:organization-other
Tamil:organization-other
Eelam:organization-other
Liberation:organization-other
Organization:organization-other
robbed:O
a:O
bank:O
van:O
of:O
Rs:O
.:O