With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Attorney
Ringgold
Hart
,
representing
Thompson
,
argued
on
April
1
,
1950
,
that
District
laws
were
unconstitutional
.
Attorney:O
Ringgold:person-other
Hart:person-other
,:O
representing:O
Thompson:person-other
,:O
argued:O
on:O
April:O
1:O
,:O
1950:O
,:O
that:O
District:O
laws:O
were:O
unconstitutional:O
.:O