With no explanation, label each line with "product-airplane", "O", "location-island", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
By
1934
,
the
Office
could
intercept
and
decrypt
Soviet
Navy
messages
after
monitoring
and
comparing
its
communications
and
movement
extensively
with
a
Hansa-Brandenburg
W.33
reconnaissance
plane
above
the
Gulf
of
Finland
and
from
neighbouring
islands
.
By:O
1934:O
,:O
the:O
Office:O
could:O
intercept:O
and:O
decrypt:O
Soviet:organization-other
Navy:organization-other
messages:O
after:O
monitoring:O
and:O
comparing:O
its:O
communications:O
and:O
movement:O
extensively:O
with:O
a:O
Hansa-Brandenburg:product-airplane
W.33:product-airplane
reconnaissance:O
plane:O
above:O
the:O
Gulf:location-island
of:location-island
Finland:location-island
and:O
from:O
neighbouring:O
islands:O
.:O