Question: what was the capital of the maurya empire
[{'answer': 'Pataliputra ( modern Patna )', 'provenance': [{'wikipedia_id': '554578', 'title': 'Maurya Empire', 'start_paragraph_id': 1, 'start_character': 345, 'end_paragraph_id': 1, 'end_character': 372, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]