Question: who did we get the mexican cession from
[{'answer': 'Mexico', 'provenance': [{'wikipedia_id': '448063', 'title': 'Mexican Cession', 'start_paragraph_id': 1, 'start_character': 84, 'end_paragraph_id': 1, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '448063', 'title': 'Mexican Cession', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 773, 'bleu_score': 0.915533748573467, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15053429044533962950}, 'section': 'Section::::Abstract.'}]}]