With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
2018
South
Korean
by-elections
was
held
in
South
Korea
on
13
June
2018
,
coinciding
with
the
local
elections
.
The:O
2018:O
South:location-GPE
Korean:location-GPE
by-elections:O
was:O
held:O
in:O
South:location-GPE
Korea:location-GPE
on:O
13:O
June:O
2018:O
,:O
coinciding:O
with:O
the:O
local:O
elections:O
.:O