Question: who designed the tomb of the unknown soldier
[{'answer': 'Lorimer Rich', 'provenance': [{'wikipedia_id': '67991', 'title': 'Tomb of the Unknown Soldier (Arlington)', 'start_paragraph_id': 5, 'start_character': 277, 'end_paragraph_id': 5, 'end_character': 289, 'bleu_score': 1.0, 'section': 'Section::::Tomb of 1931.\n'}]}, {'provenance': [{'wikipedia_id': '67991', 'title': 'Tomb of the Unknown Soldier (Arlington)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 637, 'bleu_score': 0.9605459459520521, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11163069018724037017}, 'section': 'Section::::Tomb of 1931.\n'}]}]