Question: what did cro-magnon man paint on cave walls
[{'answer': 'animals', 'provenance': [{'wikipedia_id': '182028', 'title': 'Cave painting', 'start_paragraph_id': 15, 'start_character': 237, 'end_paragraph_id': 15, 'end_character': 244, 'bleu_score': 1.0, 'section': 'Section::::Dating.\n'}]}]