Question: when did pearl harbor day become a holiday
[{'answer': 'August 23 , 1994', 'provenance': [{'wikipedia_id': '21571988', 'title': 'National Pearl Harbor Remembrance Day', 'start_paragraph_id': 2, 'start_character': 3, 'end_paragraph_id': 2, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21571988', 'title': 'National Pearl Harbor Remembrance Day', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 324, 'bleu_score': 0.508140050783616, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14178906269767072869}, 'section': 'Section::::Abstract.'}]}]