descriptopm

"operator"=>"Verdi","source:date"=>"2016-09-22"

"operator"=>"Stichting Oog","source:date"=>"2014-03-24"

"isced:level"=>"0;1","operator"=>"Verdi","operator:website"=>"https://verdi.nl/","source:date"=>"2016-10-13"