With no explanation, label each line with "location-GPE", "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
It
was
the
anniversary
of
the
US
Three
Mile
Island
nuclear
incident
which
was
the
occasion
of
a
substantial
rally
in
South
Korea
in
March
2011
.
It:O
was:O
the:O
anniversary:O
of:O
the:O
US:event-other
Three:event-other
Mile:event-other
Island:event-other
nuclear:event-other
incident:event-other
which:O
was:O
the:O
occasion:O
of:O
a:O
substantial:O
rally:O
in:O
South:location-GPE
Korea:location-GPE
in:O
March:O
2011:O
.:O