Question: how many chapters are there in bhagavad gita
[{'answer': '18 chapters', 'provenance': [{'wikipedia_id': '23277715', 'title': 'Bhagavad Gita', 'start_paragraph_id': 46, 'start_character': 26, 'end_paragraph_id': 46, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Content.:Chapters.\n'}]}]