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 ":".
Heulwen
Evans
ALCM
was
the
organist
from
1960
until
2000
.
Heulwen:person-artist/author
Evans:person-artist/author
ALCM:person-artist/author
was:O
the:O
organist:O
from:O
1960:O
until:O
2000:O
.:O