With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
song
has
been
sung
by
Rick
Astley
in
duet
with
Søren
Sko
and
covered
by
Thomas
Anders
(
ex-Modern
Talking
)
.
The:O
song:O
has:O
been:O
sung:O
by:O
Rick:person-artist/author
Astley:person-artist/author
in:O
duet:O
with:O
Søren:person-artist/author
Sko:person-artist/author
and:O
covered:O
by:O
Thomas:person-artist/author
Anders:person-artist/author
(:O
ex-Modern:O
Talking:O
):O
.:O