Question: which branch has the power to issue pardons to persons convicted of federal crimes
[{'answer': 'President of the United States', 'provenance': [{'wikipedia_id': '288593', 'title': 'Pardon', 'start_paragraph_id': 174, 'start_character': 96, 'end_paragraph_id': 174, 'end_character': 126, 'bleu_score': 1.0, 'section': 'Section::::By country.:United States.:U.S. Constitution.\n'}]}, {'provenance': [{'wikipedia_id': '288593', 'title': 'Pardon', 'start_paragraph_id': 174, 'start_character': 0, 'end_paragraph_id': 174, 'end_character': 524, 'bleu_score': 0.828829173685186, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15605322235886047687}, 'section': 'Section::::By country.:United States.:U.S. Constitution.\n'}]}]