Question: who announces president at state of the union
[{'answer': 'the Sergeant at Arms', 'provenance': [{'wikipedia_id': '3552115', 'title': 'Sergeant at Arms of the United States House of Representatives', 'start_paragraph_id': 4, 'start_character': 51, 'end_paragraph_id': 4, 'end_character': 71, 'bleu_score': 1.0, 'section': 'Section::::Duties.\n'}]}, {'provenance': [{'wikipedia_id': '3552115', 'title': 'Sergeant at Arms of the United States House of Representatives', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 867, 'bleu_score': 0.956962195859655, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17962936686467219329}, 'section': 'Section::::Duties.\n'}]}]