Symbol meaning that it is advised to read some articles first for a better understanding.
<ul><li><a href="//commons.wikimedia.org/wiki/File:ArticlesToBeReadFirst_v1.svg" title="File:ArticlesToBeReadFirst v1.svg">ArticlesToBeReadFirst_v1.svg</a>: <a href="//commons.wikimedia.org/w/index.php?title=User:Pamplelune&amp;action=edit&amp;redlink=1" class="new" title="User:Pamplelune (page does not exist)">Pamplelune</a></li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Lady_Whistler" title="User:Lady Whistler">Lady Whistler</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Lady_Whistler" title="User talk:Lady Whistler"><span class="signature-talk">talk</span></a>)</li></ul>
CC BY-SA 3.0
<ul><li><a href="//commons.wikimedia.org/wiki/File:ArticlesToBeReadFirst_v1.svg" title="File:ArticlesToBeReadFirst v1.svg">ArticlesToBeReadFirst_v1.svg</a></li></ul>