With no explanation, label each line with "location-GPE", "O", "organization-education", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
This
effect
was
first
seen
by
Russian
physicists
in
the
1960s
in
A.F.Ioffe
Physicotechnical
Institute
,
Leningrad
,
Russia
.
This:O
effect:O
was:O
first:O
seen:O
by:O
Russian:location-GPE
physicists:O
in:O
the:O
1960s:O
in:O
A.F.Ioffe:organization-education
Physicotechnical:organization-education
Institute:organization-education
,:O
Leningrad:location-GPE
,:O
Russia:location-GPE
.:O