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 ":".
The
accident
,
which
is
the
worst
offshore
accident
to
date
,
drew
the
attention
of
the
offshore
industry
and
the
regulators
to
the
damage
that
could
arise
in
the
event
of
an
explosion
and
fire
on
an
offshore
platform
,
and
triggered
changes
that
have
shaped
the
current
offshore
regulatory
and
operating
environment
.
The:O
accident:O
,:O
which:O
is:O
the:O
worst:O
offshore:O
accident:O
to:O
date:O
,:O
drew:O
the:O
attention:O
of:O
the:O
offshore:O
industry:O
and:O
the:O
regulators:O
to:O
the:O
damage:O
that:O
could:O
arise:O
in:O
the:O
event:O
of:O
an:O
explosion:O
and:O
fire:O
on:O
an:O
offshore:O
platform:O
,:O
and:O
triggered:O
changes:O
that:O
have:O
shaped:O
the:O
current:O
offshore:O
regulatory:O
and:O
operating:O
environment:O
.:O