Question: the oldest expression in art is found in caves in the south of what country
[{'answer': 'Indonesian', 'provenance': [{'wikipedia_id': '182028', 'title': 'Cave painting', 'start_paragraph_id': 5, 'start_character': 391, 'end_paragraph_id': 5, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]