Question: what stores metadata instead of actual data in dbms
[{'answer': 'a metadata repository', 'provenance': [{'wikipedia_id': '33815178', 'title': 'Metadata repository', 'start_paragraph_id': 8, 'start_character': 95, 'end_paragraph_id': 8, 'end_character': 116, 'bleu_score': 1.0, 'section': 'Section::::Definition.\n'}]}, {'provenance': [{'wikipedia_id': '33815178', 'title': 'Metadata repository', 'start_paragraph_id': 30, 'start_character': 0, 'end_paragraph_id': 30, 'end_character': 718, 'bleu_score': 0.982060959997838, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1578369517152003376}, 'section': 'Section::::Reason for use.\n'}]}]