")
          feMerge.append("feMergeNode")
              .attr("in", "SourceGraphic");

          areas.attr("filter", "url(#dropshadowfilter)");
        </script>
    </div>
    <div id="original">
        <script>
            var chart = venn.VennDiagram()
                             .width(500)
                             .height(500);

            d3.select("#original").datum(sets).call(chart);
        </script>
    </div>
</body>
</html>
