Question: who sings the intro to sunday night football
[{'answer': 'Carrie Underwood', 'provenance': [{'wikipedia_id': '3613092', 'title': 'NBC Sunday Night Football', 'start_paragraph_id': 63, 'start_character': 721, 'end_paragraph_id': 63, 'end_character': 737, 'bleu_score': 1.0, 'section': 'Section::::Scheduling.:2010s.:2014.\n'}]}, {'provenance': [{'wikipedia_id': '3613092', 'title': 'NBC Sunday Night Football', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 811, 'bleu_score': 0.9860618656782161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7175218905301130615}, 'section': 'Section::::Scheduling.:2010s.:2014.\n'}]}]