SIRS Knowledge Source [new translator]

New translator for SIRS Knowledge Source, a ProQuest K-12 database
(Note: this only covers Knowledge Source, not SIRS Discoverer or SIRS Decades)
I don't think that `[1]` at the end does what you think it does. It would select the first `href` attribute on each `a` node. Wrap in everything before it in parentheses or just select the first `a` node via `ZU.xpath` and get ther `.href` from there. (the latter makes most sense IMO)