Question: who is entitled to a 21 gun salute
[{'answer': 'former U.S. Presidents', 'provenance': [{'wikipedia_id': '713664', 'title': '21-gun salute', 'start_paragraph_id': 169, 'start_character': 399, 'end_paragraph_id': 169, 'end_character': 421, 'bleu_score': 1.0, 'section': 'Section::::By country.:United States.\n'}]}, {'answer': 'foreign Heads of State', 'provenance': [{'wikipedia_id': '713664', 'title': '21-gun salute', 'start_paragraph_id': 169, 'start_character': 423, 'end_paragraph_id': 169, 'end_character': 445, 'bleu_score': 1.0, 'section': 'Section::::By country.:United States.\n'}]}, {'answer': 'Presidents - elect', 'provenance': [{'wikipedia_id': '713664', 'title': '21-gun salute', 'start_paragraph_id': 169, 'start_character': 501, 'end_paragraph_id': 169, 'end_character': 518, 'bleu_score': 1.0, 'section': 'Section::::By country.:United States.\n'}]}, {'answer': 'members of a reigning royal family'}, {'answer': 'the President of the United States'}, {'provenance': [{'wikipedia_id': '713664', 'title': '21-gun salute', 'start_paragraph_id': 169, 'start_character': 0, 'end_paragraph_id': 169, 'end_character': 626, 'bleu_score': 0.8873694719030271, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15905227237858719456}, 'section': 'Section::::By country.:United States.\n'}]}]