With no explanation, label each line with "O", "other-language", "person-artist/author", "art-other", "art-broadcastprogram", "art-film", "art-music", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Guglielmo
Ratcliff
is
a
tragic
opera
in
four
acts
by
Pietro
Mascagni
to
an
Italian
libretto
by
Andrea
Maffei
,
translated
from
the
German
play
``
Wilhelm
Ratcliff
``
(
1822
)
by
Heinrich
Heine
.
Guglielmo:art-other
Ratcliff:art-other
is:O
a:O
tragic:O
opera:O
in:O
four:O
acts:O
by:O
Pietro:person-artist/author
Mascagni:person-artist/author
to:O
an:O
Italian:other-language
libretto:O
by:O
Andrea:person-artist/author
Maffei:person-artist/author
,:O
translated:O
from:O
the:O
German:other-language
play:O
``:O
Wilhelm:art-other
Ratcliff:art-other
``:O
(:O
1822:O
):O
by:O
Heinrich:person-artist/author
Heine:person-artist/author
.:O