Question: the oldest known wall paintings were discovered in a cave in
[{'answer': 'Indonesia', 'provenance': [{'wikipedia_id': '182028', 'title': 'Cave painting', 'start_paragraph_id': 4, 'start_character': 205, 'end_paragraph_id': 4, 'end_character': 214, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]