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
continued
his
war
service
as
senior
air
staff
officer
at
Headquarters
No
.
He:O
continued:O
his:O
war:O
service:O
as:O
senior:O
air:O
staff:O
officer:O
at:O
Headquarters:O
No:O
.:O