Parameters
        ----------
        parsed_json : dict
            with keys 'data' and 'id', where 'data' contains a recording and
            'id' is the id on write-math.com for debugging purposes

def predict(self, parsed_json):
        """
        Parameters
        ----------
        parsed_json : dict
            with keys 'data' and 'id', where 'data' contains a recording and
            'id' is the id on write-math.com for debugging purposes
        """
        evaluate = utils.evaluate_model_single_recording_preloaded
        results = evaluate(self.preprocessing_queue,
                           self.feature_list,
                           self.model,
                           self.output_semantics,
                           json.dumps(parsed_json['data']),
                           parsed_json['id'])
        return results