With no explanation, label each line with "O", "event-protest", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
Sorority
's
Golden
50th
Anniversary
was
celebrated
in
the
same
year
as
the
1963
March
on
Washington
for
Jobs
and
Freedom
.
The:O
Sorority:O
's:O
Golden:O
50th:O
Anniversary:O
was:O
celebrated:O
in:O
the:O
same:O
year:O
as:O
the:O
1963:O
March:O
on:O
Washington:event-protest
for:event-protest
Jobs:event-protest
and:event-protest
Freedom:event-protest
.:O