With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
operated
until
1941
when
the
land
was
converted
to
an
army
base
and
civil
airport
operations
were
moved
to
Dartmouth
Airport
(
now
CFB
Shearwater
)
and
then
to
Halifax
International
Airport
in
1960
.
It:O
operated:O
until:O
1941:O
when:O
the:O
land:O
was:O
converted:O
to:O
an:O
army:O
base:O
and:O
civil:O
airport:O
operations:O
were:O
moved:O
to:O
Dartmouth:location-other
Airport:location-other
(:O
now:O
CFB:location-other
Shearwater:location-other
):O
and:O
then:O
to:O
Halifax:location-other
International:location-other
Airport:location-other
in:O
1960:O
.:O