Question: who was the conquistador that conquered the aztec empire and who helped him
[{'answer': 'Hernán Cortés', 'provenance': [{'wikipedia_id': '5865939', 'title': 'Spanish conquest of the Aztec Empire', 'start_paragraph_id': 2, 'start_character': 93, 'end_paragraph_id': 2, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Xicotencatl the Younger', 'provenance': [{'wikipedia_id': '5865939', 'title': 'Spanish conquest of the Aztec Empire', 'start_paragraph_id': 2, 'start_character': 405, 'end_paragraph_id': 2, 'end_character': 428, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5865939', 'title': 'Spanish conquest of the Aztec Empire', 'start_paragraph_id': 2, 'start_character': 59, 'end_paragraph_id': 2, 'end_character': 510, 'bleu_score': 0.515730190429617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8133727948847114619}, 'section': 'Section::::Abstract.'}]}]