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 ":".
12
seats
to
the
National
Assembly
of
South
Korea
were
contested
.
12:O
seats:O
to:O
the:O
National:organization-government/governmentagency
Assembly:organization-government/governmentagency
of:organization-government/governmentagency
South:organization-government/governmentagency
Korea:organization-government/governmentagency
were:O
contested:O
.:O