Question: who was the first person to be buried at arlington national cemetery
[{'answer': 'William Henry Christman', 'provenance': [{'wikipedia_id': '83390', 'title': 'Arlington National Cemetery', 'start_paragraph_id': 6, 'start_character': 1213, 'end_paragraph_id': 6, 'end_character': 1236, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '83390', 'title': 'Arlington National Cemetery', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1534, 'bleu_score': 0.9920790520013891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7234123845399724186}, 'section': 'Section::::History.\n'}]}]