$eXc = new eXcavator($doc, eXcavator_STRING);
    $eXc->eXcavator_Query('owner[[CDATA]]');
    $result = $eXc->eXcavator_getResultAsXMLDoc();

       // free XML_PulParser's resources, since we are going to create a new XML_PullParser instance
    $eXc->eXcavator_free();

    $child_tags = array("Last_name", "First_name", "Street", "City", "Zip");
    $tags = array("owner");

    $parser = new XML_PullParser_doc($result,$tags,$child_tags);
    while($token = $parser->XML_PullParser_getToken()) {

      foreach($child_tags as $tag) {
      	outputData($tag,1);
            if($tag == "City") {
         	   outputData($tag,2);
            }

      }
     echo "\n";
    }

    function outputData($element, $which) {
      global $parser;
      $parser->XML_PullParser_getElement($element);
      $text = $parser->XML_PullParser_getText($element, $which);
      echo "$element: $text\n";
    }

    /*
 Result

Last_name: Taylor
First_name: Michael
Street: 323 Oak Bay
City: Winnipeg
City:
Zip: R3B 1B6

Last_name: Jones
First_name: Douglas
Street: 200 Winnipegosis Ave
City: St Adolphe
City: Winnipeg
Zip: R3L 1Z5
*/

$child_tags = array("Last_name", "First_name", "Street", "City", "Zip", "owner");
$tags = array("vehicle");

$parser = new XML_PullParser_doc($doc,$tags,$child_tags);

while($token = $parser->XML_PullParser_getToken()) {

  $owner = $parser->XML_PullParser_getElement("owner");

  foreach($child_tags as $el) {

      if($el == 'owner') {   // if we don't exclude owner, all text in owner will be output in one
              continue;      // access to XML_PullParser_getText($child) in the outputData function;
      }
       $child = $parser->XML_PullParser_getChild($el,1);
       outputData($el,$child);
       if($el == "City") {
         $child = $parser->XML_PullParser_getChild($el,2);
         outputData($el,$child);
       }

 }
echo "\n";
}

function outputData($el,$child) {
  global $parser;

  $text = $parser->XML_PullParser_getText($child);
  echo "$el: $text\n";

}