Question: of which religion is the avesta a sacred book
[{'answer': 'Zoroastrianism', 'provenance': [{'wikipedia_id': '63118', 'title': 'Avesta', 'start_paragraph_id': 1, 'start_character': 59, 'end_paragraph_id': 1, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]