Question: who was the first soldier to be buried at arlington national cemetery
[{'answer': 'William Henry Christman', 'provenance': [{'wikipedia_id': '22562766', 'title': 'William Henry Christman', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22562766', 'title': 'William Henry Christman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 122, 'bleu_score': 0.9021315316859231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4641905698277921682}, 'section': 'Section::::Abstract.'}]}]