code: def body_block_supplementary_material_render(supp_tags, base_url=None):
      
      source_data = []
      for supp_tag in supp_tags:
          for block_content in body_block_content_render(supp_tag, base_url=base_url):
              if block_content != {}:
                  if "content" in block_content:
                      del block_content["content"]
                  source_data.append(block_content)
      return source_data
docs: fig and media tag caption may have supplementary material