With no explanation, label each line with "O", "organization-religion", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
After
National
Service
,
Sangster
joined
the
Vernons
organisation
,
becoming
managing
director
and
then
serving
as
chairman
from
1980
to
1988
.
After:O
National:O
Service:O
,:O
Sangster:person-other
joined:O
the:O
Vernons:organization-religion
organisation:organization-religion
,:O
becoming:O
managing:O
director:O
and:O
then:O
serving:O
as:O
chairman:O
from:O
1980:O
to:O
1988:O
.:O