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 ":".
Yuna
Imada
contributes
the
harsh
vocals
.
Yuna:person-artist/author
Imada:person-artist/author
contributes:O
the:O
harsh:O
vocals:O
.:O