sbool listToCL_debug;

static L<S> listToCL(L<S> l) {
  new L<S> out;
  for (S line : l) {
    S c = englishToConceptLanguage(line);
    if (listToCL_debug) print(line + " => " + c);
    out.add(c);
  }
  ret out;
}