Question: when did the holocaust museum in washington dc open
[{'answer': 'April 26 , 1993', 'provenance': [{'wikipedia_id': '553427', 'title': 'United States Holocaust Memorial Museum', 'start_paragraph_id': 9, 'start_character': 723, 'end_paragraph_id': 9, 'end_character': 738, 'bleu_score': 1.0, 'section': "Section::::History.:President's Commission on the Holocaust.\n"}]}, {'provenance': [{'wikipedia_id': '553427', 'title': 'United States Holocaust Memorial Museum', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 830, 'bleu_score': 0.9415090610231861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9792995727984210649}, 'section': "Section::::History.:President's Commission on the Holocaust.\n"}]}]