With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
He
then
became
General
Officer
Commanding-in-Chief
Eastern
Command
in
April
1932
before
retiring
in
April
1936
.
He:O
then:O
became:O
General:O
Officer:O
Commanding-in-Chief:O
Eastern:O
Command:O
in:O
April:O
1932:O
before:O
retiring:O
in:O
April:O
1936:O
.:O