With no explanation, label each line with "O", "organization-politicalparty", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
first
,
Communists
denounced
the
Campaign
for
Nuclear
Disarmament
for
``
splitting
the
peace
movement
''
but
they
were
compelled
to
join
it
when
they
saw
how
popular
it
was
.
At:O
first:O
,:O
Communists:organization-politicalparty
denounced:O
the:O
Campaign:organization-other
for:organization-other
Nuclear:organization-other
Disarmament:organization-other
for:O
``:O
splitting:O
the:O
peace:O
movement:O
'':O
but:O
they:O
were:O
compelled:O
to:O
join:O
it:O
when:O
they:O
saw:O
how:O
popular:O
it:O
was:O
.:O