Question: what size bullet does an ak 47 shoot
[{'answer': '5.45 × 39mm'}, {'provenance': [{'wikipedia_id': '2471637', 'title': 'Comparison of the AK-47 and M16', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 450, 'bleu_score': 0.80024714952453, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16079161753440744273}, 'section': 'Section::::Abstract.'}]}]