Topic on Talk:Quarry

Hi, I'm newbie at Quarry and I wanted to make a query for gl.wiki but I don't know how make it, could somebody help me?

At gl.wiki we wanted to get the number of female writers of category of writers of Galicia, https://gl.wikipedia.org/wiki/Categor%C3%ADa:Escritores_de_Galicia, and subcategories. Note that an article could appear at one or more subcategories, that's a the problem.

Deep category search with SQL is very difficult unless the depth of the category is one or two. Use PetScan instead.

Thanks!