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 ":".
Revenue
then
grew
from
£50m
in
1990
to
over
£100m
in
1995
and
£350m
by
1999
.
Revenue:O
then:O
grew:O
from:O
£50m:O
in:O
1990:O
to:O
over:O
£100m:O
in:O
1995:O
and:O
£350m:O
by:O
1999:O
.:O