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 ":".
The
alliance
was
formed
by
the
Sammarinese
Socialist
Party
and
the
Sammarinese
Communist
Party
,
and
was
opposed
by
the
Popular
Alliance
,
an
alliance
of
the
Sammarinese
Christian
Democratic
Party
and
the
Sammarinese
Democratic
Socialist
Party
.
The:O
alliance:O
was:O
formed:O
by:O
the:O
Sammarinese:organization-politicalparty
Socialist:organization-politicalparty
Party:organization-politicalparty
and:O
the:O
Sammarinese:organization-politicalparty
Communist:organization-politicalparty
Party:organization-politicalparty
,:O
and:O
was:O
opposed:O
by:O
the:O
Popular:organization-other
Alliance:organization-other
,:O
an:O
alliance:O
of:O
the:O
Sammarinese:organization-politicalparty
Christian:organization-politicalparty
Democratic:organization-politicalparty
Party:organization-politicalparty
and:O
the:O
Sammarinese:organization-politicalparty
Democratic:organization-politicalparty
Socialist:organization-politicalparty
Party:organization-politicalparty
.:O