static S webToStringShort(Web web) {
  try {
    if (web == null) ret "-";
    int n = l(web_nodes(web));
    if (n == 0) ret "Empty web";
    WebNode a = web_firstNode(web);
    if (n == 1) ret join(" = ", web_texts(a));
    if (n == 2) {
      WebNode b = web_secondNode(web);
      ret ai_renderTriple(web_text(a), web_text(web_getRelation(a, b)), web_text(b));
    }
    ret "Includes " + joinWithComma(map web_text(web_nodes(web)));
  } catch print e {
    ret "Error";
  }
}