!7

p {
  S html = "yo" + htitle("hello") + "and so on";
  Pair<S> pTitle = hextracttag(html, 'title);
  if (pairBNotNull(pTitle))
    print("Have title: " + join(contentsOfContainerTag(htmlTok(pTitle.b)));
  html = pTitle.a;
  print(html);
}