With no explanation, label each line with "building-other", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
During
the
1960s
and
1970s
,
Ontario
Hydro
's
nuclear
generating
program
expanded
with
the
building
of
the
first
four
units
of
the
Pickering
Nuclear
Generating
Station
followed
by
stations
at
Bruce
Nuclear
Generating
Station
and
a
second
four
units
at
Pickering
.
During:O
the:O
1960s:O
and:O
1970s:O
,:O
Ontario:organization-company
Hydro:organization-company
's:O
nuclear:O
generating:O
program:O
expanded:O
with:O
the:O
building:O
of:O
the:O
first:O
four:O
units:O
of:O
the:O
Pickering:building-other
Nuclear:building-other
Generating:building-other
Station:building-other
followed:O
by:O
stations:O
at:O
Bruce:building-other
Nuclear:building-other
Generating:building-other
Station:building-other
and:O
a:O
second:O
four:O
units:O
at:O
Pickering:building-other
.:O