static S solveCandidatesRiddle(L<Lisp> facts) {
  // assume question is in last line of riddle
  Lisp q = last(facts);
  L<S> candidates = subList(q.heads(), 1);
  ret web_candidateWithMostConfirms(facts, q.s(0), candidates);
}

static S solveCandidatesRiddle(L<Lisp> facts, S riddle) {
  ret solveCandidatesRiddle(riddle(facts, riddle));
}