// find line that differs in only one word
// take line after that and rewrite the word
svoid ai_answerFromSpeechLog_singleWordChanged(S input) {
  for (PairS lines : overlappingPairs(speechLog())) {
    SS map = pairToCIMap(gazelle_singleChangedWord_ifMoreThanOneWord(lines.a, input)), continue if null;
    emit(replaceVars(lines.b, map));
  }
}