Question: who made delhi the capital of his kingdom for the first time
[{'answer': 'Qutb al - Din Aibak', 'provenance': [{'wikipedia_id': '295402', 'title': 'Delhi Sultanate', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Dynasties.:Mamluk (Slave).\n'}]}, {'provenance': [{'wikipedia_id': '295402', 'title': 'Delhi Sultanate', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 628, 'bleu_score': 0.96462321510169, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17176623146320912252}, 'section': 'Section::::Abstract.'}]}]