<https://larryullman.com/forums/index.php?/topic/29-part-3-physical-products-ch8-creating-a-catalog/#comment-211>
<http://schema.org/text>
"Yeah, that's not really the solution or what I meant. In fact, it's not a solution at all. What you did is created those variables (and gave two of them inappropriate values). What you should do is print out what values the variables have. That should be determined by code earlier in the scripot. "
<https://larryullman.com/forums/index.php?/topic/29-part-3-physical-products-ch8-creating-a-catalog/#comment-308>