With no explanation, label each line with "O", "building-theater", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
War
Memorial
Opera
House
which
opened
in
1932
,
was
the
site
of
some
significant
post
World
War
II
history
.
The:O
War:building-theater
Memorial:building-theater
Opera:building-theater
House:building-theater
which:O
opened:O
in:O
1932:O
,:O
was:O
the:O
site:O
of:O
some:O
significant:O
post:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
II:event-attack/battle/war/militaryconflict
history:O
.:O