Question: what is the most common language in mexico
[{'answer': 'Spanish', 'provenance': [{'wikipedia_id': '3935520', 'title': 'Languages of Mexico', 'start_paragraph_id': 1, 'start_character': 378, 'end_paragraph_id': 1, 'end_character': 385, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3935520', 'title': 'Languages of Mexico', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 631, 'bleu_score': 0.9788329837059241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9816838893400821298}, 'section': 'Section::::Abstract.'}]}]