With no explanation, label each line with "O", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
He
was
Aide-de-Camp
to
Queen
Victoria
from
1868
to
1878
when
,
now
promoted
Major-general
,
he
was
appointed
assistant
military
secretary
to
Prince
George
,
Duke
of
Cambridge
.
He:O
was:O
Aide-de-Camp:O
to:O
Queen:person-politician
Victoria:person-politician
from:O
1868:O
to:O
1878:O
when:O
,:O
now:O
promoted:O
Major-general:O
,:O
he:O
was:O
appointed:O
assistant:O
military:O
secretary:O
to:O
Prince:person-other
George:person-other
,:O
Duke:O
of:O
Cambridge:O
.:O