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
latter
of
those
two
albums
was
not
released
until
after
1971
,
when
Seán
Ó
Riada
died
.
The:O
latter:O
of:O
those:O
two:O
albums:O
was:O
not:O
released:O
until:O
after:O
1971:O
,:O
when:O
Seán:person-artist/author
Ó:person-artist/author
Riada:person-artist/author
died:O
.:O