With no explanation, label each line with "location-GPE", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
aircraft
was
flown
into
Berlin
with
RAF
markings
to
comply
with
the
four
power
agreement
and
took
part
in
the
upcoming
air
day
.
The:O
aircraft:O
was:O
flown:O
into:O
Berlin:location-GPE
with:O
RAF:organization-other
markings:O
to:O
comply:O
with:O
the:O
four:O
power:O
agreement:O
and:O
took:O
part:O
in:O
the:O
upcoming:O
air:O
day:O
.:O