Question: who is guest judge on america got talent
[{'answer': 'Ken Jeong', 'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 12, 'start_character': 634, 'end_paragraph_id': 12, 'end_character': 643, 'bleu_score': 1.0, 'section': 'Section::::Judge Cuts.\n'}]}, {'answer': 'Olivia Munn', 'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 12, 'start_character': 645, 'end_paragraph_id': 12, 'end_character': 656, 'bleu_score': 1.0, 'section': 'Section::::Judge Cuts.\n'}]}, {'answer': 'Martina McBride', 'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 12, 'start_character': 658, 'end_paragraph_id': 12, 'end_character': 673, 'bleu_score': 1.0, 'section': 'Section::::Judge Cuts.\n'}]}, {'answer': 'Chris Hardwick', 'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 12, 'start_character': 679, 'end_paragraph_id': 12, 'end_character': 693, 'bleu_score': 1.0, 'section': 'Section::::Judge Cuts.\n'}]}, {'provenance': [{'wikipedia_id': '57001539', 'title': "America's Got Talent (season 13)", 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 886, 'bleu_score': 0.9871375943883031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2607389304269317317}, 'section': 'Section::::Judge Cuts.\n'}]}]