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 ":".
As
of
2001
,
oil
remained
on
or
under
more
than
half
the
sound
's
beaches
,
according
to
a
2001
federal
survey
.
As:O
of:O
2001:O
,:O
oil:O
remained:O
on:O
or:O
under:O
more:O
than:O
half:O
the:O
sound:O
's:O
beaches:O
,:O
according:O
to:O
a:O
2001:O
federal:O
survey:O
.:O