Topic on Talk:Quarry

@Edgars2007 and others. Any idea how to find images like this https://commons.wikimedia.org/wiki/File:Arbol_y_cielo_sepia.jpg

For only hidden cat the quarry is like this: https://quarry.wmflabs.org/query/38499

By what properties?

@Wargo, actually I didn't get the point, but the goal is to find an image like this ([https://commons.wikimedia.org/wiki/File:%C3%87ay_dayaz_1.jpg]): hidden categories and one unexisting category (= red category)

Table categorylinks also stores red categories assignement so you can add someting like

WHERE cl_to = 'Uncategorized media with description in Azerbaijani language'