With no explanation, label each line with "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Having
converted
to
jets
from
the
Spitfires
he
flew
throughout
the
war
,
he
was
posted
to
the
Belgian
Air
Force
as
an
air
adviser
in
1949
.
Having:O
converted:O
to:O
jets:O
from:O
the:O
Spitfires:O
he:O
flew:O
throughout:O
the:O
war:O
,:O
he:O
was:O
posted:O
to:O
the:O
Belgian:organization-other
Air:organization-other
Force:organization-other
as:O
an:O
air:O
adviser:O
in:O
1949:O
.:O