With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Then
she
became
a
chief
operating
officer
for
the
health
region
and
then
Fraser
Health
from
1997
to
2005
.
Then:O
she:O
became:O
a:O
chief:O
operating:O
officer:O
for:O
the:O
health:O
region:O
and:O
then:O
Fraser:O
Health:O
from:O
1997:O
to:O
2005:O
.:O