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 ":".
Upon
his
death
,
Gulzarilal
Nanda
once
again
assumed
the
role
of
Acting
Prime
Minister
until
the
Congress
Parliamentary
Party
elected
Indira
Gandhi
over
Morarji
Desai
to
succeed
Shastri
.
Upon:O
his:O
death:O
,:O
Gulzarilal:person-politician
Nanda:person-politician
once:O
again:O
assumed:O
the:O
role:O
of:O
Acting:O
Prime:O
Minister:O
until:O
the:O
Congress:organization-politicalparty
Parliamentary:organization-politicalparty
Party:organization-politicalparty
elected:O
Indira:person-politician
Gandhi:person-politician
over:O
Morarji:person-politician
Desai:person-politician
to:O
succeed:O
Shastri:person-politician
.:O