Using a filter bubble like "meta.domain is one of (wikipedia.org, wikidata.org, wikimedia.org)" yields no results currently. It's be great if this worked based on e.g. simple term matching so that it includes e.g. www.wikidata.org and ar.m.wikipedia.org.
I thought maybe the issue is that the "one of" operator doesn't do term matching but that "is" does, however, `meta.domain is wikipedia.org" also yielded zero results.
Then I entered "meta.domain is org" and that did yield results from various third-party domains that ended in .org, such as en.wiki2.org.