Question: when did the aztecs arrived at lake texcoco
[{'answer': '1325', 'provenance': [{'wikipedia_id': '615505', 'title': 'Lake Texcoco', 'start_paragraph_id': 9, 'start_character': 81, 'end_paragraph_id': 9, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Tenochtitlan.\n'}]}, {'provenance': [{'wikipedia_id': '615505', 'title': 'Lake Texcoco', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 488, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7618436357316403552}, 'section': 'Section::::Tenochtitlan.\n'}]}]