With no explanation, label each line with "O", "organization-company", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1999
Lebedev-Frontov
was
co-founder
of
art-gallery
GEZ21
(
``
Галерея
экспериментального
звука
``
)
.
In:O
1999:O
Lebedev-Frontov:person-politician
was:O
co-founder:O
of:O
art-gallery:organization-company
GEZ21:organization-company
(:O
``:O
Галерея:organization-company
экспериментального:organization-company
звука:organization-company
``:O
):O
.:O