Question: where do we find san rock art paintings
[{'answer': 'caves', 'provenance': [{'wikipedia_id': '36220452', 'title': 'San rock art', 'start_paragraph_id': 1, 'start_character': 203, 'end_paragraph_id': 1, 'end_character': 208, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'on rock shelters', 'provenance': [{'wikipedia_id': '36220452', 'title': 'San rock art', 'start_paragraph_id': 1, 'start_character': 213, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '36220452', 'title': 'San rock art', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 407, 'bleu_score': 0.9318557434050331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5215131013188621821}, 'section': 'Section::::Abstract.'}]}]