static S ai_renderNodeHTML_shorten(int max, WebNode n) {
  ret ai_renderNodeHTML_shorten(max, n, "-");
}

static S ai_renderNodeHTML_shorten(int max, WebNode n, S defaultText) {
  if (n == null || !web_hasLabels(n)) ret defaultText;
  ret joinWithComma(map html_encyclopediaTopic(shortenAll(max, web_texts(n))));
}