Question: who was the leader of the aztecs when the spanish soldiers invaded their land
[{'answer': 'Aztec Emperor Moctezuma II', 'provenance': [{'wikipedia_id': '5865939', 'title': 'Spanish conquest of the Aztec Empire', 'start_paragraph_id': 3, 'start_character': 654, 'end_paragraph_id': 3, 'end_character': 680, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5865939', 'title': 'Spanish conquest of the Aztec Empire', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 1217, 'bleu_score': 0.8293780466013271, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14295910435621268317}, 'section': 'Section::::Abstract.'}]}]