docs: def get_annotation_tags(index_page):
      """
      Return list of descriptions parsed from ``<meta>`` tags and dublin core
      inlined in ``<meta>`` tags.
  
      Args:
          index_page (str): HTML content of the page you wisht to analyze.
  
      Returns:
          list: List of ``SourceString`` objects.
      """
      dom = dhtmlparser.parseString(index_page)
  
      descriptions = [
          get_html_annotations(dom),
          get_dc_annotations(dom),
      ]
  
      return sum(descriptions, [])