Question: what is the capital of zamfara state in nigeria
[{'answer': 'Gusau', 'provenance': [{'wikipedia_id': '2227664', 'title': 'Zamfara State', 'start_paragraph_id': 1, 'start_character': 59, 'end_paragraph_id': 1, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2227664', 'title': 'Zamfara State', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 195, 'bleu_score': 0.6554744742578541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17602031225729908561}, 'section': 'Section::::Abstract.'}]}]