With no explanation, label each line with "O", "location-GPE", "art-broadcastprogram", "person-director", "person-other", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Extensive
on-set
footage
of
the
filming
of
``
A
Scanner
Darkly
``
was
featured
in
a
UK
documentary
about
Richard
Linklater
directed
by
Irshad
Ashraf
and
broadcast
on
Channel
4
in
December
2004
.
Extensive:O
on-set:O
footage:O
of:O
the:O
filming:O
of:O
``:O
A:art-broadcastprogram
Scanner:art-broadcastprogram
Darkly:art-broadcastprogram
``:O
was:O
featured:O
in:O
a:O
UK:location-GPE
documentary:O
about:O
Richard:person-other
Linklater:person-other
directed:O
by:O
Irshad:person-director
Ashraf:person-director
and:O
broadcast:O
on:O
Channel:O
4:O
in:O
December:O
2004:O
.:O