static int katzeLog_pairsCloseInTime_maxSeconds = 12;

// returns strings without date
static L<Pair<S>> katzeLog_pairsCloseInTime() {
  new L<Pair<S>> l;
  for (Pair<S> p : listToOverlappingPairs(mL_katzeLog())) {
    long dateDiff = parseKatzeLogEntryDate(p.b)-parseKatzeLogEntryDate(p.a);
    if (dateDiff/1000.0 > katzeLog_pairsCloseInTime_maxSeconds) continue;
    l.add(pairMap dropLeadingSquareBracketStuff(p));
  }
  ret l;
}