Question: when was the first time hispanic heritage was celebrated in usa
[{'answer': '1968', 'provenance': [{'wikipedia_id': '2675084', 'title': 'National Hispanic Heritage Month', 'start_paragraph_id': 5, 'start_character': 165, 'end_paragraph_id': 5, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '2675084', 'title': 'National Hispanic Heritage Month', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 979, 'bleu_score': 0.9496337438754171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10047574203273064134}, 'section': 'Section::::History.\n'}]}]