minor issue.... with html::treebuilder

[bruce]

hi...

i have a small situation where i'm trying to get the text for the
"parent"/top item...
i'm trying to use html::treebuilder as the parsing app...

the html is:
   .
   .
   .
<tr class="tbon"> @0.1.1.0.0.0.2.1.0.0.0.3.1
  <td colspan=7> @0.1.1.0.0.0.2.1.0.0.0.3.1.0
    <p class="tbtx"> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0
      <span class="em"> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0.0
        "ACCA  310F "
        <span class="on"> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0.0.1
          "FOUNDATIONS OF ACCOUNTING"
      " A A "
      <b> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0.2
   .
   .
   .

i'm trying to figure out how to access/print "ACC 310F" as a separate
element...

using:
@span_tree = $tbtx_tree[0]->look_down("_tag"=>"span");
print "tree span = ". $span_tree[0]->parent()->dump() ."\n";

generates:
      <span class="em"> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0.0
        "ACCA  310F "
        <span class="on"> @0.1.1.0.0.0.2.1.0.0.0.3.1.0.0.0.1
          "FOUNDATIONS OF ACCOUNTING"

i appear to be having an issue with my approach given that both tags are
"spans".. any way to separate them...

i can get the "FOUNDATIONS..." by simply looking at $span_tree[1]...., but
$span_tree[0] appears to contain both spans.. any way to separate them...

any ideas/comments/criticisms/etc.. would be appreciated...

thanks

-bruce