enrich the babelfied data with the text an the isEntity items
        set self._entities with the enriched data

def _parse_entities(self):
        """enrich the babelfied data with the text an the isEntity items
        set self._entities with the enriched data
        """
        entities = list()

        for result in self._data:
            entity = dict()
            char_fragment = result.get('charFragment')
            start = char_fragment.get('start')
            end = char_fragment.get('end')
            entity['start'] = start
            entity['end'] = end
            entity['text'] = self._text[start: end+1]
            if sys.version < '3' and isinstance(entity['text'], str):
                entity['text'] = entity['test'].decode('utf-8')
            entity['isEntity'] = True
            for key, value in result.items():
                entity[key] = value
            entities.append(entity)
        self._entities = entities