Question: what language do they speak in kabul afghanistan
[{'answer': 'Kabul', 'provenance': [{'wikipedia_id': '7719033', 'title': 'Languages of Afghanistan', 'start_paragraph_id': 8, 'start_character': 52, 'end_paragraph_id': 8, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}]