Question: when did the volcanic eruption in pompeii occur
[{'answer': 'AD 79', 'provenance': [{'wikipedia_id': '30752226', 'title': 'Eruption of Mount Vesuvius in 79', 'start_paragraph_id': 15, 'start_character': 215, 'end_paragraph_id': 15, 'end_character': 220, 'bleu_score': 1.0, 'section': 'Section::::Nature of the eruption.:Stratigraphic studies.\n'}]}]