static L<S> splitIntoSentences_v2(S s) {
  ret splitIntoSentences_v2_tok(nlTok3(s));
}

static L<S> splitIntoSentences_v2_tok(L<S> s) {
  int i = 0;
  new L<S> l;
  while (i < l(s)) {
    int j;
    if (emptyAfterTrim(l.get(i)) && isRoundBracketed(get(l, i+1)))
      j = i+2;
    else
      j = smartIndexOfAny(s, i, ".", "?")+1;
    addIfNempty(l, trim(join(subList(s, i, j))));
    i = j;
  }
  ret l;
}