Subcategories meta.wikimedia.org GLAM
Fetch pages from meta.wikimedia.org for category GLAM, max 9 levels deep:

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1 GLAM -> 2 subcats, 8 articles
    2 GLAMcamp -> 4 articles
    2 Libraries -> 4 articles

3 unique categories scanned, with in total 16 unique articles (namespace 0), in 0 seconds.