anchor.diff:          _ ->
               []
       end.
  -
  
positive.code:             ]
      end.
  
      prepare_result(_Block, undefined, _Context) ->
          {undefined, undefined, undefined};
      prepare_result(Block, Stats, Context) ->
          Type = proplists:get_value(type, Block),
          {
           Stats,
           prep_chart(Type, Block, Stats, Context),
           [] % mod_survey:question_to_props(Question)
          }.
  
  prep_chart(_Type, _Block, undefined, _Context) ->
      undefined;
  prep_chart(Type, Block, Stats, Context) ->
  
negative.code:     z_db:q("DELETE FROM survey_answer WHERE " ++ Clause ++ " and survey_id = $2", Args ++ [SurveyId], Context).
  
  
  %% @private
  survey_captions(Id, Context) ->
      case m_rsc:p(Id, blocks, Context) of
          Blocks when is_list(Blocks) ->
  