I'm using httrack to spider pages with a picture tag with source subtags.  The
content referenced in the source subtag's srcset attributes are not showing up
in by crawled results.

Does httrack recognize the picture/source/srcset? 


<picture>
 			<!--[if IE 9]><video style="display: none;"><![endif]-->
      <source
srcset="/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.620X413.png"
media="(min-width: 960px)">
      <source
srcset="/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.480X320.png,
/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.960X640.png
2x" media="(min-width: 728px)">
      <source
srcset="/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.320X213.png,
/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.640X416.png
2x,
/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.960X640.png
3x" media="(min-width: 320px)">
      <!--[if IE 9]></video><![endif]-->
      <img src=""
srcset="/content/dam/Medtronic/US/Citizenship/citizenship-hero1.jpg.CROP.thumbnail.620X413.png"
alt="Medtronic's Commitment to Sustainability and Citizenship">
</picture>