With no explanation, label each line with "organization-company", "O", "building-other", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
Clutha
River
scheme
is
operated
by
Contact
Energy
,
and
consists
of
two
powerhouses
:
Clyde
Dam
(
464
MW
,
commissioned
1992
)
and
Roxburgh
Dam
(
320
MW
,
commissioned
1962
)
.
The:O
Clutha:location-other
River:location-other
scheme:O
is:O
operated:O
by:O
Contact:organization-company
Energy:organization-company
,:O
and:O
consists:O
of:O
two:O
powerhouses:O
::O
Clyde:building-other
Dam:building-other
(:O
464:O
MW:O
,:O
commissioned:O
1992:O
):O
and:O
Roxburgh:building-other
Dam:building-other
(:O
320:O
MW:O
,:O
commissioned:O
1962:O
):O
.:O