With no explanation, label each line with "O", "organization-politicalparty", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Official
Opposition
was
the
Liberal
Party
,
led
first
by
interim
leader
Bill
Graham
,
and
then
by
Stéphane
Dion
for
the
remainder
of
the
Parliament
's
life
.
The:O
Official:O
Opposition:O
was:O
the:O
Liberal:organization-politicalparty
Party:organization-politicalparty
,:O
led:O
first:O
by:O
interim:O
leader:O
Bill:person-politician
Graham:person-politician
,:O
and:O
then:O
by:O
Stéphane:person-politician
Dion:person-politician
for:O
the:O
remainder:O
of:O
the:O
Parliament:O
's:O
life:O
.:O