Question: during what dynasty did the chinese make explosives
[{'answer': 'Tang dynasty', 'provenance': [{'wikipedia_id': '12063194', 'title': 'History of gunpowder', 'start_paragraph_id': 1, 'start_character': 365, 'end_paragraph_id': 1, 'end_character': 377, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]