Question: what year were the olimpic games in mexico
[{'answer': '1968', 'provenance': [{'wikipedia_id': '83115', 'title': '1968 Summer Olympics', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '83115', 'title': '1968 Summer Olympics', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 205, 'bleu_score': 0.709814637375763, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 303227431417910145}, 'section': 'Section::::Abstract.'}]}]