When you are a speaker on a conference and somebody asks you a question which you didn't quite understood or which is too complicated to give a short answer the common practice is to answer something like "Could you please find me after this talk and I try to answer you then?". In Russian there is a word for this - 'в кулуарах', from French word 'couloir', corridor. It is translated as 'on the sidelines' according to Google Translate. Still I never heard such an expression from a native speaker and apparently it has something to do with baseball, not conferences.
So what would native speaker usually say in such a situation?