With no explanation, label each line with "O", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Soviet
Union
became
the
world
's
leading
producer
of
oil
,
coal
,
iron
ore
and
cement
;
manganese
,
gold
,
natural
gas
and
other
minerals
were
also
of
major
importance
.
The:O
Soviet:organization-government/governmentagency
Union:organization-government/governmentagency
became:O
the:O
world:O
's:O
leading:O
producer:O
of:O
oil:O
,:O
coal:O
,:O
iron:O
ore:O
and:O
cement:O
;:O
manganese:O
,:O
gold:O
,:O
natural:O
gas:O
and:O
other:O
minerals:O
were:O
also:O
of:O
major:O
importance:O
.:O