With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
During
this
time
his
only
known
publication
was
an
essay
from
1940
in
which
he
discussed
Soviet
and
German
interaction
in
the
Baltics
.
During:O
this:O
time:O
his:O
only:O
known:O
publication:O
was:O
an:O
essay:O
from:O
1940:O
in:O
which:O
he:O
discussed:O
Soviet:location-GPE
and:O
German:location-GPE
interaction:O
in:O
the:O
Baltics:O
.:O