static void printWeb(Web web) {
  if (web == null) { print("-"); ret; }
  L<Pair<WebNode>> relations = web_nonEmptyRelations(web);
  print("Web: " + n(web.nodes, "node") + ", " + n(relations, "relation"));
  pnl(collectMethod(web_nonRelationNodes(web.nodes), 'text));
  print();
}