Question: when was father day declared a national holiday
[{'answer': '1972', 'provenance': [{'wikipedia_id': '41826181', 'title': "Father's Day (United States)", 'start_paragraph_id': 7, 'start_character': 960, 'end_paragraph_id': 7, 'end_character': 964, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '41826181', 'title': "Father's Day (United States)", 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 964, 'bleu_score': 0.9872197907830691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9113657588185484913}, 'section': 'Section::::History.\n'}]}]