query: SELECT ?label ?item ?item2 {
    ?item rdfs:label ?label FILTER( LANG( ?label ) = 'cs' ) .
    ?item2 rdfs:label ?label .
    FILTER( ?item != ?item2 ) .
    FILTER( ?label NOT IN ( "Krucifix"@cs, "Autoportrét"@cs ) ) .
    MINUS { ?item schema:description ?desc FILTER( LANG( ?desc ) = 'cs' ) } .
    MINUS { ?item2 schema:description ?desc2 FILTER( LANG( ?desc2 ) = 'cs' ) } .
    FILTER( STR( ?item ) < STR( ?item2 ) ) .
    MINUS { ?item wikibase:propertyType [] } .
    MINUS { ?item2 wikibase:propertyType [] } .
  } LIMIT 1000