With no explanation, label each line with "O", "organization-other", "organization-politicalparty", "person-politician", "location-GPE", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
The
SWP
traces
its
origins
back
to
the
former
Communist
League
of
America
(
CLA
)
,
founded
in
1928
by
members
of
the
CPUSA
expelled
for
supporting
Russian
communist
leader
Leon
Trotsky
against
Joseph
Stalin
.
The:O
SWP:organization-other
traces:O
its:O
origins:O
back:O
to:O
the:O
former:O
Communist:organization-other
League:organization-other
of:organization-other
America:organization-other
(:O
CLA:organization-other
):O
,:O
founded:O
in:O
1928:O
by:O
members:O
of:O
the:O
CPUSA:organization-politicalparty
expelled:O
for:O
supporting:O
Russian:location-GPE
communist:O
leader:O
Leon:person-politician
Trotsky:person-politician
against:O
Joseph:person-politician
Stalin:person-politician
.:O