With no explanation, label each line with "O", "organization-politicalparty", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
After
the
Sharpeville
massacre
in
1960
,
under
enormous
international
pressure
,
the
Broederbond
began
a
slow
and
quiet
re-examination
of
their
policy
proposals
.
After:O
the:O
Sharpeville:event-attack/battle/war/militaryconflict
massacre:event-attack/battle/war/militaryconflict
in:O
1960:O
,:O
under:O
enormous:O
international:O
pressure:O
,:O
the:O
Broederbond:organization-politicalparty
began:O
a:O
slow:O
and:O
quiet:O
re-examination:O
of:O
their:O
policy:O
proposals:O
.:O