HrRinger on "Fancy box - can't find where it's defined."

I have a fancy box on this page:
http://www.mercurymosaics.com/mosaic-classes/

It currently says
"View Calendar
Beginner and Advanced Classes"

and I want to remove the "and advanced" but can't seem to find where this part of the fance box is defined.

I see in viewing source that

<div class="tech_specs">
<div class="sidebar_btn view_cal"><a class="calendar_fancybox fancybox.iframe" href="http://events.r20.constantcontact.com/calendar/monthview?llr=ao4x9bcab&eso=0013E3ffB86CHoPKdhAtFlb-g=="><h3>View Calendar</h3>
Beginner and Advanced Classes</a></div><!--End name-->

But not sure where this item is defined.

Any help?

Thanks.