MediaWiki:Wm-license-cc-zero-explanation/qqq
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This message uses the singular "they", "their", "them" or "themself" as a gender-neutral pronoun. This should be translated preserving the singular meaning as fit for your language in a gender-neutral way.
This is the second line of Commons:Template:Cc-zero explaining the license. Here, a deed is a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it (Google define: deed).
Refers to Wm-license-pd-wiki-link ("w:en:public domain
").