With no explanation, label each line with "O", "organization-other", "person-scholar", "organization-government/governmentagency", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
The
landmark
``
Brown
v
.
Board
of
Education
``
decision
,
which
declared
unconstitutional
the
``
separate
but
equal
''
arrangements
in
public
schools
for
students
of
different
races
,
paved
the
way
for
``
PARC
v
.
Commonwealth
of
Pennsylvania
``
and
``
Mills
vs
.
Board
of
Education
of
District
of
Columbia
``
,
which
challenged
the
segregation
of
students
with
special
needs
.
The:O
landmark:O
``:O
Brown:person-scholar
v:O
.:O
Board:organization-education
of:organization-education
Education:organization-education
``:O
decision:O
,:O
which:O
declared:O
unconstitutional:O
the:O
``:O
separate:O
but:O
equal:O
'':O
arrangements:O
in:O
public:O
schools:O
for:O
students:O
of:O
different:O
races:O
,:O
paved:O
the:O
way:O
for:O
``:O
PARC:organization-other
v:O
.:O
Commonwealth:organization-government/governmentagency
of:organization-government/governmentagency
Pennsylvania:organization-government/governmentagency
``:O
and:O
``:O
Mills:person-scholar
vs:O
.:O
Board:organization-government/governmentagency
of:organization-government/governmentagency
Education:organization-government/governmentagency
of:organization-government/governmentagency
District:organization-government/governmentagency
of:organization-government/governmentagency
Columbia:organization-government/governmentagency
``:O
,:O
which:O
challenged:O
the:O
segregation:O
of:O
students:O
with:O
special:O
needs:O
.:O