static L<Web> websMadeByProgram(S progID) {
  new L<Web> webs;
  L l = scanLog_safeUnstructure(progID, "webs-made.txt");
  for (O o : l) pcall {
    S structure = (S) getOpt(o, 'structure);
    if (structure != null)
      webs.add((Web) unstructure(structure));
  }
  ret webs;
}