Question: who recorded the eruption of mt. vesuvius
[{'answer': 'Pliny the Younger', 'provenance': [{'wikipedia_id': '30752226', 'title': 'Eruption of Mount Vesuvius in 79', 'start_paragraph_id': 1, 'start_character': 185, 'end_paragraph_id': 1, 'end_character': 202, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]