With no explanation, label each line with "other-disease", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
continued
to
conduct
research
and
publish
books
in
his
later
years
,
focusing
in
his
last
years
on
the
search
for
a
vaccine
against
HIV
.
He:O
continued:O
to:O
conduct:O
research:O
and:O
publish:O
books:O
in:O
his:O
later:O
years:O
,:O
focusing:O
in:O
his:O
last:O
years:O
on:O
the:O
search:O
for:O
a:O
vaccine:O
against:O
HIV:other-disease
.:O