With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Ninety-one
rig
workers
were
killed
after
the
vessel
capsized
,
resulting
in
a
massive
legal
case
brought
against
the
ship
's
owners
UNOCAL
.
Ninety-one:O
rig:O
workers:O
were:O
killed:O
after:O
the:O
vessel:O
capsized:O
,:O
resulting:O
in:O
a:O
massive:O
legal:O
case:O
brought:O
against:O
the:O
ship:O
's:O
owners:O
UNOCAL:organization-company
.:O