With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
A
ceremony
attended
by
Emperor
Meiji
opened
the
museum
and
zoo
on
20
March
1882
;
the
library
was
reopened
on
September
30
.
A:O
ceremony:O
attended:O
by:O
Emperor:O
Meiji:person-politician
opened:O
the:O
museum:O
and:O
zoo:O
on:O
20:O
March:O
1882:O
;:O
the:O
library:O
was:O
reopened:O
on:O
September:O
30:O
.:O