static S getSingularFromWordHippo(S word) {
  word = tolower(word);
  SS hippoSingulars = pairsToMap((L<Pair<S>>) scanStructureLog(#1011041, "singulars"));
  try answer hippoSingulars.get(word);
  S html = loadPage("https://www.wordhippo.com/what-is/the-singular-of/" + urlencode(word) + ".html");
  S pat = "The singular form of " + word + " is";
  int i = indexOfIC(html, pat);
  if (i < 0) { print("no singular: " + html); null; }
  i += l(pat);
  int j = indexOf(html, "</b>", i);
  if (j < 0) null;
  S singular = trim(dropTags(substring(html, i, j)));
  logStructure(#1011041, "singulars", pair(word, singular));
  ret singular;
}