+ $ w3m -dump wiki/factors/tag/index.html | grep active -A3
+ ○ active
+ ■ contributors
+ ■ developers
+ ■ users
+
+And this is actually in the HTML code:
+
+ <li><a href="active/">active</a>
+ <ul>
+ <li><a href="affects/contributors/">contributors</a>
+ </li>
+ <li><a href="affects/developers/">developers</a>
+ </li>
+ <li><a href="affects/users/">users</a>
+ </li></ul>
+ </li>
+ <li><a href="approach/">approach</a>
+ </li>
+
+So it's not that the `<ul>` has an empty parent `<li>`, the three tags are
+*really* children of `active`.