With no explanation, label each line with "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Hokkaido
Imperial
University
was
renamed
Hokkaido
University
in
December
1947
,
a
name
it
retains
to
this
day
.
Hokkaido:organization-education
Imperial:organization-education
University:organization-education
was:O
renamed:O
Hokkaido:organization-education
University:organization-education
in:O
December:O
1947:O
,:O
a:O
name:O
it:O
retains:O
to:O
this:O
day:O
.:O