With no explanation, label each line with "O", "event-protest", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Following
the
Sharpeville
massacre
in
1961
,
Nkomo
was
a
mediator
between
the
government
and
the
victims
.
Following:O
the:O
Sharpeville:event-protest
massacre:event-protest
in:O
1961:O
,:O
Nkomo:person-politician
was:O
a:O
mediator:O
between:O
the:O
government:O
and:O
the:O
victims:O
.:O