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 ":".
The
4th
Center
of
Combat
Application
and
Conversion
of
Frontline
Aviation
,
Russia
's
Top
Gun
school
since
around
the
1960s
,
is
the
most
well
known
unit
on
the
base
.
The:organization-education
4th:organization-education
Center:organization-education
of:organization-education
Combat:organization-education
Application:organization-education
and:organization-education
Conversion:organization-education
of:organization-education
Frontline:organization-education
Aviation:organization-education
,:O
Russia:location-GPE
's:O
Top:O
Gun:O
school:O
since:O
around:O
the:O
1960s:O
,:O
is:O
the:O
most:O
well:O
known:O
unit:O
on:O
the:O
base:O
.:O